Originally Posted by
Nymrohd
Cheat, cheat, cheat!
You can use Lightblood Elixir and Blessed Bandages. If the Mage Tower is up at the same time with the Command Center, you will get the buffs during the Agatha encounter (including things like a meteor that can nearly one shot multiple imps or that circle that gives you +50% damage done and -50% damage taken).
Now on how do this properly. Use Brutal Slash, remember that bleed effects do not break entangling roots for feral so if you rip and rake and THEN apply roots on a healing imp, you can just let it bleed to death away from Agatha.