Obfuscate will only place them well in raids if they actually use the ability. Most people in this game, when given a defensive type of ability, don't use it as dps. As being both a tank AND healer, during heavy damage phases, please use this ability.
On top of this, let's at least place some useful information. Marauders do burst damage. Carnage does instant damage, Annihilation does damage over time through bleeds, but still has good instant damage going. idk much about the shared tree.



Bloodthirst (+15% healing and damage for your party for 15 seconds) and Obfuscate (reduces target's melee abd ranged accuracy by 90% for 6 seconds) should place this class in heavy demand in Operations and Heroic Flashpoints.
Predation (+50% movement speed for your party for 10s) and Deadly Throw (reduces target's healing rceived by 20% for 15 seconds) should make this class desired in pre-made Warfront groups.