
I spent like 25 revives on the collector alone. Was a real bad time.
I ran out of units when he was at 20% and had been in the quest for a week or so and finally defeated him using the team revive from the calendar today..
Here's my roster if anyone's curious.

Btw I just noticed uncollected is locked. Need lvl 40 to unlock. Guess I wont be gaining much right now..hehe..