Do this:
Are you the tank?
If yes, did you die while tanking in STR gear?
If No, ask the healer if they had to struggle to keep you up, did they?
If no, Keep on keeping on. If yes, start swapping out some vit items and see how that does until you get better gear, or use CD's effectively.

All this may change in upcoming content, but right now, I haven't come across anything that really posed any threat to me other than the healer falling asleep, as a tank in str. (note, I'm speaking as a warrior and NOT in Savage Alex).

I actually had a healer in Neverreap EX roulette tell me to stay in deliverance and in my str gear and just tank in that. It was the quickest and smoothest run I ever been in for roulette. I wish I remembered the healers name.