Marathon Bosses
The Compiler
LocationVault 07, Cryo Archive (Vault Breaker PvE mode)
WeaknessNot documented
DropsHigh-value loot, advanced materials, rare gear, endgame resources
Recommended Level—
MovesMulti-phase data-corruption-field fight; spawns additional enemies mid-encounter; has a companion Warden sub-boss
Tip: Keep constantly moving since static positioning is punished, clear high-threat adds first, use the Vault cover to break line-of-sight, and save burst damage for the clear vulnerability windows.
UESC Grenadier CMDR
LocationSurface maps and Vaults (random mini-boss / Incursion encounter)
WeaknessNot documented
DropsRare loot
Recommended Level—
MovesArmored, heavy-damage grenadier variant of the standard UESC Grenadier
Tip: Tougher than the standard Grenadier thanks to its armor -- treat it as a priority target rather than fighting it alongside a full wave of regular UESC troops.