That bug is here from Normal mode. If you dps him too quickly to 5-4%, he'll just immune out, and don't stop the fight, so you're screwed. That **** is rages me out even more then oneshot force lightning. Tryinf to dps as much as possible so he won't oneshot u, and see this immune ****...

Lets count. U are in cover. Warrior runs on you( he can't charge at all).Oh wait, worst case scenario. Sith Marauder pops out of Force Camo right on you. Now, he recieves 4 sec stun(he uses CC breaker), u'll use Entrentch to be immune to CC and cast ambush with 10m knockback(SORRY BRO I'M IN COVER AN SHOOTING IN UR FACE), legshot after this(lets say its 2.5 sec). He runs to you( HE CAN'T CHARGE), after coming near u'll use cover pulse , now his sowhere back(2 sec immobilize), u'll shot him with snipe again, and throw flash bang for another cc and energy regen. After this CD on your leg shot will gone - leg shot another 2.5 sec root. And u think warrior is still not dead? Marauders have only one form of CC they can try = Force Choke and its channeled, so warrior will be standing still and doing low damage.