Tanks for both of your replies.
Survivability isn't really the problem here, its the time to kill, as I mentioned, just getting to the boss in the first place took twice a long as it did with a brute, and now my Corr too.
I can learn to better move the bots with binds etc, that's childs-play, my issue is Damage.
Expedient reinforcements in all bot slots, and i feel like its a total waste.