OPERATOR INVESTMENT
Leveling Priority, Skill Ranks, Sanity ROI & Team-Building Strategy
Last updated: 2026-04-26
Operator investment priority guide for Arknights: Endfield. Level targets by role, skill rank sweet spots, diminishing returns thresholds, and team-building framework from 2-team to endgame depth.
* TL;DR - Key Points
- * Level 60 is the Golden Milestone -- Unlocks T4 Gold gear; costs ~470 Sanity vs ~2,000 Sanity for 80→90
- * Level 80 is the practical floor -- All roles function well at 80; 90 only for primary hypercarry
- * Skill Rank 9 is the sweet spot -- 85-90% of functional power; Mastery only for main DPS carry
- * Build 2-3 teams, not 4 -- Two polished squads beat four half-built ones consistently
- * Main DPS first, BiS supports second -- One carry + two supports clears all current content
- * Level 80 / Skill 9 / Essence 4/4/2 -- provides 85-90% max power at less than 40% total resource cost
- * Crowns are non-farmable -- Only spend on main DPS signature skill; never on supports
Contents
Investment Targets by Role
Each role has a correct stopping point. Going beyond it provides diminishing returns that are better spent on the next operator in the team hierarchy.
| Role | Level | Weapon | Skills | Essence | Artificing |
|---|---|---|---|---|---|
| Main DPS | 80-90 | 80-90 | M3 (Battle + Ult), M1 Combo | 4/4/2 → 6/6/3 | +2 to +3 |
| Sub-DPS | 80 | 80 | 9 (damage), 7 (others) | 4/4/2 | +2 |
| Support | 60-80 | 60-80 | 9 (or M1 for utility) | 3/3 match + natural +3 Skill | +0 to +2 |
| Tank | 60-80 | 60 | 9 (sustain), 7 (CC) | 3/3/1 | +0 to +1 |
Pro Tip: Support Level 60 Can Be Correct
Some supports (particularly those whose value is entirely from passive abilities and skill effects) can remain at Level 60 indefinitely without compromising team performance in most endgame content. Every Sanity freed from support leveling goes toward the second team's carry.
Level Cost Breakdown: Where Sanity Goes
| Phase | Level Range | Sanity Cost | Milestone | Priority |
|---|---|---|---|---|
| Early | 1-20 | <100 | Basic kit access | Universal |
| Core | 20-60 | ~470 | T4 Gold gear; Skill Rank 7-9 access | All 4 members |
| Late | 60-80 | ~1,200 | Skill Rank 9 cap; significant ATK gain | DPS + Sub-DPS |
| Max | 80-90 | ~2,000 | Max base attributes (+14.3% ATK) | Hypercarry only |
The Level 60 Gate
At Elite 3 (Level 60), operators unlock T4 Gold gear, Skill Ranks 7-9, and Weapon Tuning Tier 4. Gold gear set bonuses frequently outweigh 10+ additional character levels. Getting the full team to 60 before pushing anyone to 90 is almost always the correct decision.
The 14% Problem
80→90 costs ~2,000 Sanity for a 14.3% base attribute increase. At high ATK% from gear, additional base stats become multiplicatively more valuable — making this worthwhile exclusively for hypercarries with maxed ATK% from Xiranflow and other sources.
Sanity Investment Summary: All Systems
| Investment | Sanity | Power Gain | Verdict |
|---|---|---|---|
| Level 1-60 | ~470 | Massive | Critical |
| Level 60-80 | ~1,200 | Significant | High |
| Level 80-90 | ~2,000 | Marginal (14%) | Hypercarry only |
| Skill 1-9 | ~800-1,200 | High | Critical |
| Skill 9-12 (Mastery) | ~2,000+ + Crowns | Moderate (20%) | DPS signature only |
| Weapon 1-80 | ~800-1,000 | High | Critical |
| Weapon 80-90 | ~1,500 | Moderate | Hypercarry only |
Skill Rank Guide: Where to Stop
Skills are the highest damage-per-resource investment in the game. Each rank provides cooldown reduction, extended buff durations, better SP return, and improved utility effects. The question is when to stop.
| Skill Type | Main DPS Target | Support Target | Notes |
|---|---|---|---|
| Battle Skill | M3 (Rank 12) | Rank 9 | Highest priority; most frequent use |
| Ultimate | M3 (Rank 12) | Rank 9 | Key burst power; boss phase impact |
| Combo Skill | M1 (Rank 10) | Rank 7-9 | Team synergy dependent; situational |
| Basic Attack | Rank 1-6 | Rank 1-4 | Weakest scaling; stop early |
The Crown Bottleneck: Mastery Economics
Mark of Perseverance (Crowns) cannot be farmed conventionally. Single skill 11→12 costs 3 Crowns, 50 Protohedrons, 65,000 T-Credits, and ~1,430 Sanity equivalent. Full operator Mastery (all 4 skills) requires 12 Crowns and ~58 days of natural energy.
The estimated damage gain from Rank 9 to Rank 12 is approximately 15-20%. For most of the roster, the opportunity cost — leveling an entirely new operator to Level 80 with Rank 9 skills — is higher value than Mastery on a second-string unit.
Pro Tip: Utility Upgrade Exceptions
Gilberta's Ultimate and Arclight's Ultimate gain meaningful utility at M1 (Rank 10) — additional Arts Susceptibility scaling and additional stagger respectively. These are worth a single Crown each. Most other support Masteries are not.
The Rank 9 Sweet Spot
85-90% of an operator's functional power comes from Rank 9 skills. The additional 15-20% from Mastery is real, but the investment required means Rank 9 is the correct stopping point for most of your roster.
How Many Teams Should You Build?
The most common mistake in Endfield is spreading resources too thin. Two polished teams consistently outperform four half-built ones in every piece of content.
2 Teams (Launch Target)
Day-one players can comfortably maintain two fully functional squads. This handles all current content including Umbral Monument and Turbidity Manifest.
3 Teams (Pre-CC Prep)
Begin the third team only after both primary squads are complete at Level 80 with Rank 9 skills. A slowly developing third squad is correct; a rushed one is not.
4 Teams (Late Game)
Resource-negative for most accounts before Crisis Contract mode drops. New operators and meta shifts make the fourth team a risk. Build only after genuine resource surplus.
The CC Principle: Build Now While Resources Flow
If you played original Arknights, you know the pattern — Crisis Contract drops and players who didn't prepare scramble. Current content is easy enough that investment feels optional. That's exactly when to build the foundation. One well-invested carry and a real second team ready before CC is the minimum target.
Investment Priority Framework
The correct order maximizes team output at each resource threshold before moving to the next tier.
Tier 1: First Main DPS — Full Package
Level 80-90, Weapon 80-90, Battle Skill and Ultimate to M3, 3/3 matched Flawless Essence etched to 4/4/2, Artificing +2 to +3. This operator carries all current content. Do not start Tier 2 until Tier 1 is complete.
Tier 2: BiS Supports for That Carry
Each main DPS has 1-2 Best-in-Slot supports that multiply their damage substantially. Build those to Level 80 with Rank 9 skills before investing in any flex options. Examples: Zhuang Fangyi needs Perlica + Arclight; Rossi needs Gilberta + Antal; Yvonne/Last Rite needs Xaihi.
Tier 3: Second Team's Carry + Supports
Once the first carry and BiS supports are complete, begin the second team's main DPS. Apply the same logic: get that carry to Level 80 with Rank 9 skills, then their two BiS supports. The second team's carry enables CC preparation.
Tier 4: Depth Investment
Skill Mastery beyond 9, Level 90 on the carry (if not done in Tier 1), 6/6/3 Essence etching, and support Mastery exceptions — only after Tier 3 is complete and resource surplus is confirmed.
Diminishing Returns: The Sanity Traps
These are the investments that feel valuable because the number is high, but cost far more than the power they provide — especially relative to the opportunity cost of building another operator.
Level 90 on Supports
2,000 Sanity for 14.3% base ATK. Support value comes from skill effects and buffs, not base ATK scaling. This Sanity builds the second team's carry instead.
Skill Mastery 9→12 on Supports
5,000+ Sanity and non-farmable Crowns for 15-20% gain on an operator that isn't the source of damage. Most support utility caps at Rank 9 anyway.
Essence Etching Lv.5→6 on Non-Carries
2.7% success rate, 450 Coolant Gel for guaranteed. This is a hypercarry status symbol, not a routine investment. Support essences stop at 3/3/2.
Weapon Potential 5 Before Essences
Chasing weapon dupes before securing a 3/3 matched T5 Essence. High-quality Essences with a natural +3 Skill line partially compensate for low Potential at much lower cost.
The 85% Solution
Level 80, Weapon 80, Skill Rank 9, Essence 4/4/2 provides approximately 85-90% of an operator's maximum potential power at less than 40% of the total resource cost required for a "perfect" build. This is the correct endgame target for the majority of your roster — reserve the extra 10-15% for your single hypercarry.
Common Mistakes & How to Avoid Them
1. Leveling Supports to 90
The credits and experience for 80→90 are better spent on the second team's main DPS. Fix: Cap supports at Level 80 and redirect resources to your second carry immediately.
2. Spending Crowns Before Team 2 Has a Carry
Crowns cannot be farmed. Using them for Mastery while your second team has no functional carry is a strategic mistake. Fix: Distribute Crowns only after both teams' carries reach Level 80 with Rank 9 skills.
3. Building Four Half-Baked Teams
Two operators at Level 80 with Rank 9 skills and correct essences outperform four operators at Level 60 with Rank 6 skills in almost every scenario. Fix: Depth before breadth, up to the 2-3 team threshold.
4. Ignoring Factory Infrastructure
The Dijiang factory and AIC produce experience records and T-Credits passively. Spending Sanity on Credit or XP stages that the factory covers is a direct loss. Fix: Build factory infrastructure before any heavy Sanity investment.
5. Waiting Too Long to Start the Second Team
Once your first carry reaches Level 80 and Rank 9, begin the second team's carry immediately rather than spending weeks maxing Essences and Artificing first. Fix: Establish the second carry at Level 60 with basic gear before returning to polish team one.
6. Chasing Resource Efficiency Over Enjoyment
Resource efficiency matters less than deploying operators you actually play. A well-invested operator you understand beats a meta-optimal operator you don't. The right approach: Invest in the characters you enjoy, apply the priority framework within that context, and don't let perfect efficiency stop you from playing the game.
Quick Reference: Operator Investment Checklist
Frequently Asked Questions
What level should I take my main DPS to in Arknights: Endfield?
Level 80 is the practical endpoint for most DPS operators. Level 90 is only justified for your primary hypercarry when all other resources are exhausted — the 80→90 push costs approximately 2,000 Sanity for only a 14.3% base attribute increase. Supports and utility operators function well at Level 60-80 indefinitely.
How many operators should I invest in Arknights: Endfield?
Build 2-3 polished teams rather than 4 half-built ones. Day-one players have enough resources for two fully functional squads plus a slowly developing third. Four teams before Crisis Contract mode drops is usually resource-negative. Focus on one carry plus their BiS supports, then build the second team's carry before spreading thin.
What is the best skill rank for support operators in Arknights: Endfield?
Rank 9 is the correct endpoint for most support skills. The jump from Rank 9 to Rank 12 (Mastery) costs 5,000+ Sanity and non-farmable Crowns for only 15-20% improvement — and most support utility effects cap their scaling at Rank 9 or 10 anyway. The exception: Gilberta's Ultimate and Arclight's Ultimate gain additional utility at M1 (Rank 10) and are worth the single Crown investment.
When should you stop leveling an operator in Arknights: Endfield?
For supports: stop at Level 80, Rank 9 skills, Essence 3/3/2. For sub-DPS: Level 80, Rank 9 on damage skills, Essence 4/4/2. For main DPS: Level 80 with Mastery 3 on Battle Skill and Ultimate, Essence 4/4/2 minimum. Push the main carry to Level 90 and Essence 6/6/3 only after the rest of the team is complete.
Is weapon level 90 worth it in Arknights: Endfield?
For your primary hypercarry, yes. Level 90 costs approximately 1,500 Sanity and provides a meaningful base ATK boost that every damage multiplier scales from. For support operators and sub-DPS, Level 80 is sufficient — their damage output is not the focus, and the 1,500 Sanity is better spent elsewhere. Do not take support weapons to 90.