Any tips to make the run go faster? I am trying to figure out what else I can do to make it work..

This last run where I had 30 seconds left when I got to the corruptor I didn't loot anything except bosses because I didn't have the time to spare - which sucks because I need the greens to DE, but I'd rather have a bronze drake.

I'm not sure where else I could save time - besides resurrecting my 1 guy, I didn't stop to drink anything at all. I suppose I'm probably spending too long/too much mana dropping a full totem sequence for every combat. Any optimal order to kill the undead to make it go faster? I found I pretty much have to kill the spider guys or the big stitch guys first otherwise I spend too much time healing.

Anyway, any tips people have on this would be great as I really want to get 4x bronze drakes