It's one thing to have a healing enemy that you have to keep killing in order to keep a boss from being slowly healed.
It's another thing to have a healing enemy that randomly drops an AoE that lasts even if said enemy is killed that heals for massive amounts.
The Battlepod at the end of Grinchlin Assault can only safely be done in a single phase, or people run the risk of that respawning Mender wiping any progress the party has made.
I was going to say that this was a decent idea, until I noticed that you only seemed to suggest it to fix a problem in the new temporary prestige mission.
I agree that this would be nice to add to the game, but please do it for the right reasons.