This might be common knowledge, and I know not everyone is at Archimonde yet, but this is so damn awesome if you are currently wiping on him.
Archimonde is an awesome fight, and having no trash and a short corpserun makes it even more awesome. But this DOES give you shitloads of repaircosts...
Unless, you die in the Doomfires he casts. This is positive to give you 0 repaircosts. So if you are about to wipe, run into doomfire and die that way!
*Searched for Archimonde, and that gave me no results (none like what I have here anyway.