Not only can troopers do amazing damage, but they can go in their healer tree and still do amazing damage...
Not only can they do damage, but they have a knock back and the single best cc in the entire game in the Cryo Grenade...
So not only are they the strongest healers, they are the strongest DD, and the strongest CC.
I open on this trooper (as Sniper) get him to 50% health, he heals to full instantly, he then cryo grenades me, to which my cc break is down, (at this point im at 100% health) I cannot break the cc and he kills me b4 the cc breaks... seriously broaken.