Renegade Marauder Squad
Renegade Marauders are troops of the Lost and the Damned. Consisting of Pirates, mercenaries, and other raiders abound in sectors that have fallen to Chaos and rejected the Imperial Cult, many renegade leaders are willing to pay exorbitant fees to coerce these masterless rogues into their forces. They are considered as the 'elites' of the renegades and are much more skilled in combat than your average Cultist.
Tabletop
The base points of a Marauder Squad is relatively decent, considering they have WS4 I4 A2 for base staats, and the leader comes with a second wound, but to add more models to the squad, you’re paying 10 points per model, and if you want to add up to 2 Brutes (stats of an Ork Nob with +1W and Rending), you’re talking a whopping 30 points per model. As they’re “In it For the Money” the unit is unable to regroup for any reason after failing a morale test, which means once they fail a LD8 test, they’re effectively gone from the game. The upside is that they get one of 3 special traits for free, either Stalkers (outflank, stealth, move through cover), Murder Cultists (furious charge and crusader), or Hereteks (4+ armour save and krak grenades).
The only way you could make this unit work is by keeping them cheap, taking 2 meltaguns and having them outflank in a Chimera or Arvus.