Spotter: mark the target, then delete it
Spotter turns a hard target into an easy one. The dart is not damage, it is permission for the whole team to crit.
Dart the biggest thing on the floor first, then shoot. Marked targets take guaranteed crits for seven seconds, so the dart is worth more the moment before a swarm lands, not after.
Spotter turns a hard target into an easy one. The Crit Dart does not do much damage on its own; what it does is guarantee that every shot the team lands on that target crits.
That makes Spotter the class that scales with your team rather than with your aim.
Dart, scanner, ammo
| Tool | Effect | Duration / capacity |
|---|---|---|
| Crit Dart | Marks a target; marked enemies take guaranteed critical hits | 7 seconds |
| Scanner (passive) | Radar refreshes every 4 seconds, showing allies, enemies and points of interest within 35 metres | Always on |
| Scanner (active) | Outlines all enemies red and supplies white, visible through walls to the whole team | Per activation |
| Ranger's Pocket | Throws an ammo pack that restores 50% of a player's maximum ammunition | One pack |
Values from the official wiki, checked 2026-11-15. The dart has a slight dropoff, so it is a projectile rather than an instant mark.
When he earns the slot
You want Spotter when your team has damage but no focus. Marking a target tells three other players what to shoot without anyone speaking.
You also want it when ammo is the run's real limit. Ranger's Pocket restores half a player's maximum ammo, which on a long Gauntlet level is the difference between finishing and running dry.
Spotter by depth
Depth 1 and 2, Spotter is a support class in fights that do not need support. The mark still helps, but small enemies die to one burst either way.
Depth 3, the scanner becomes the ability that matters. Molaktula's arenas have verticality and turrets, and seeing through walls is worth more than a crit on a target you cannot find.
Depth 4, Spotter is a real pick for a coordinated team and a hard pick for a random one. Balgorath's projectiles block shots, so a guaranteed crit is only useful in the gaps, and the team has to know to use them.
Mark rule
Dart the biggest thing on the floor, then let someone else shoot it. The mark is a team buff, not a personal damage cooldown. A Spotter who darts a target and then reloads has wasted seven seconds of guaranteed crits.
The correct time to dart is the moment before a swarm lands, or the moment a Gatekeeper becomes vulnerable, so the whole window is spent with the mark live.

A concrete opener
On the first floor, activate the scanner as you leave the equipment crate. The red outlines show you the floor's enemy density before you commit to a route, and the yellow cone on the radar tells you which direction you are covered in.