TL;DR
Run Operative into Assassin, capped by the Exemplar, and build the whole thing around Intelligence with Agility and Ballistic Skill behind it. Patch 1.6 (the Sixth Gargantuan Update, 11 June 2026) buffed both halves of this path on purpose, and the free party-wide respec that shipped with it means any existing save can rebuild into this for nothing. The headline fixes: Operative's Analyse Enemy and the Assassin's Aim for the Opening now both fire during additional and interrupt turns, so the kit finally plays nicely with Officer double-turns instead of breaking on them. Grenades were reworked to scale off Intelligence and can now crit, which an INT-stacked Operative-Assassin picks up for free.
If you want the knife-and-shadows fantasy, there is a melee variant lower down. The ranged Operative-Assassin is the one we lead with, because it captures the new grenade and Exploit scaling and is the cleaner build to pilot.
Why the Assassin is worth running after 1.6
Before this patch, the honest read on the Assassin was B-tier among the advanced archetypes. The single-target burst was real, but the positional opening system was clumsy in big multi-enemy fights, and that dragged output below Arch-Militant and Grand Strategist. The 1.6 changes close most of that gap. For where this lands the archetype now, see the class tier list.
Three fixes carry the build. The entity:operative half's Analyse Enemy now keeps working through additional and interrupt turns, so it no longer falls apart the moment an Officer hands you a second action. On the entity:assassin side, Aim for the Opening got the same treatment, and Lethality now scales correctly from Dodge Penetration, which is the resource that feeds Death Whisper, Killing Edge, and Feinting Attack. The Operative talent line also got a broad scaling pass across Fresh Target, Tide of Excellence, Ballistics Calculation, and several others. The full change list lives in the Patch 1.6 notes.
We are not calling this the outright top-DPS archetype in the game. We are calling it the most-improved one in 1.6, and now firmly competitive with the front-runners. If you already saw this kit in action on entity:marazhai or on the Death Cult companion entity:kibellah, the player version reaches further because you control every stat point and talent.
The build at a glance
| Layer | Pick |
|---|---|
| Homeworld | Forge World |
| Origin | Crime Lord |
| Tier 1 (level 1) | Operative |
| Tier 2 (level 16) | Assassin |
| Tier 3 (level 36) | Exemplar |
| Primary stat | Intelligence |
| Secondary | Agility |
| Tertiary | Ballistic Skill / Perception |
entity:forge-world hands you the Analytics System augmentation, and it is one of the two origins 1.6 updated to plug into the new Sector Bionica augmentation system. entity:crime-lord brings Sure-Fire Plan to boost your next action plus a Perception bonus that helps strip enemy dodge. These are the picks we run, not the only legal ones; the path works from other origins, this pairing just maxes the scaling.
Stat priority
Intelligence comes first. It sets your Exploit stacks (Analyse Enemy applies stacks equal to your Intelligence bonus, the first digit of the score) and, post-1.6, it scales your grenades. Agility comes second: it feeds dodge, drives most of the Assassin ability math, and powers Danse Macabre mobility. Ballistic Skill and Perception sit just behind for hit chance and dodge-stripping.
A clean target spread for the headline build:
| Stat | Target |
|---|---|
| Intelligence | 45 |
| Agility | 40 |
| Ballistic Skill | 40 |
| Weapon Skill | 35 |
| Toughness | 35 |
| Perception | 35 |
| Strength | 30 |
| Willpower | 30 |
| Fellowship | 25 |
When you level, pour points into Intelligence and Agility first, then Ballistic Skill. Do not spread thin across everything; the build wants two tall stats, not nine even ones.
How the engine actually works
The Operative half builds the kill. Analyse Enemy drops Exploit stacks on the target, each one adding 10% damage against that target. Weak-point exploits add roughly 5% per point of Perception bonus on top. Tide of Excellence stacks more Exploits and pushes your own damage and penetration, which is exactly why it is the standout pickup for an Assassin sub-path.
The Assassin half cashes it in. The keystone, Seek the Opening, shows one opening on a side of each enemy; hit it and you deal an extra 10% of that target's max wounds. After your attack the opening rotates to the opposite side, and any opening you ignored re-randomizes at the start of your next turn. The rhythm settles into reading the openings, repositioning, and striking the soft side.
Around that keystone you have the burst tools. Death Whisper only deals 25% base damage on the hit, but it applies haemorrhage for Lethality-over-ten rending damage every turn, ignoring armor, and it does not eat your attack limit or block movement. Killing Edge adds Lethality-over-five damage, scaling up with the target's missing wounds, which makes it a finisher. Feinting Attack strips armor penetration to set up the next hit and grants Lethality. Poised to Strike carves enemy armor and deflection while topping up your own dodge.
Two survival pieces keep a squishy melee-leaning character alive. Elusive Shadow drops you to lowest-priority target for a round and hands you a dodge spike, fading the moment you attack. Danse Macabre dashes you up to one-plus-half-your-Agility-bonus cells, cuts attack-of-opportunity damage, and can be used twice a turn. That mobility is what lets you reach the right opening without eating the whole enemy line.
When you need a target gone, Dispatch is the heroic act: it cannot miss, adds 50% damage plus a quarter of the target's missing wounds, and doubles your dodge, dodge reduction, armor penetration, and parry reduction. The Desperate Measures version is identical but leaves you taking double damage until combat ends, so save it for the kill that actually closes the fight.
Weapons and gear
The Assassin wants single-target burst, not high-rate-of-fire dakka; leave the spray to the Arch-Militant. For the ranged build, lean on the highest single-shot weapons: a item:sniper-rifle as the core, with a item:long-las or item:stub-revolver as backup. The new grenade scaling means a damaging grenade is now a real second damage source for an INT-heavy character, so keep a few in the kit.
For the melee variant, run a item:venom-blade as your main hand with a Sniper Rifle sidearm for openers, and keep the dodge-tank profile light. This is the version that prioritizes Agility, Perception, and Weapon Skill over raw Intelligence; it trades some grenade and Exploit scaling for the close-range knife play around openings. The companion entity:kibellah build covers the same melee-Assassin pattern if you want to see it on an NPC chassis.
Build: 7f21bae918c1Leveling path
Take Operative at level 1 and play the Exploit game from the start. A workable talent order through the Tier-1 stretch: Instant Exposure at 4, Weak Body Weak Soul at 6, Inflict Despair at 8, Tide of Excellence at 11, Fresh Target at 13. For abilities, grab Perfect Spot at 7 and Intimidation at 12. At level 16, take Assassin, then build into the opening-and-haemorrhage tools as they open up. The Exemplar at 36 deepens whatever you have committed to, so by then your stat spread and talent choices already decide its shape. If you want a pure single-shot ranged comparison, the sniper build guide walks the parallel Operative path.
The thread running through all of it stays the same: Intelligence and Agility climb every chance you get, Ballistic Skill follows, and every talent point either makes an Exploit stack hit harder or gets you to the right opening faster.