Tank only first boss?

I tank all bosses in WP self-heal only 1 piece of AF2 (hands) and 1 hero's fending ring. (rest full DL, relic+1).
The first boss is the easiest, 2nd bost is a bit ricky, 3rd boss is easy as well.

I won't miss the big heals, great utility {Yes, please.}! I can use it at-will, when I want it & need it.