I am healer.
Last night I ticked "join party in progress" for AK. I usually am scared of that option because of my past experiences.
1 Boss was down, the party was at the wall. Turns out all 3 or so members were new.
Demon wall died at the time the bees spawned, the tank did not had to tank them etc.
Following that, the tank could tank 2 trash group at a time, without any issue.

Conclusion:
- some times you get lucky.