I applied a simple rule :
No defensive CD, no healing.. You better be ready to hit your ultimate.

If the tank do a half job, i'm doing worse.

In a normal situation i always my tank sweat by dpsing as much as i can the heal bomb them to top
But if forget to help me with mitigation... I will forget to help him.

(Yesterday i did it to my war friend who said "don't let me die i didn't repair my stuff"... Well i really forgot to heal him and he drop to 1 HP thanks to holmgang XD and I was " oh shit sorry I forgot " > benediction....... He hate me so much because i did it 3 time during the whole expert)