Lol, those damn totems.

Its impossible to understand what the dev folk and qa believe are difficult and what is fun.

I would expect stronger and smarter heals, patrols, annoying run in fear/call for help, they dont stop coming until x is dead, you need to kill them within x seconds, untauntable, the mobs smart crowd control, the instance annoyingly keeps you in combat.

The challenge stuff will be able time, so think 45min run, avoid mobs not leeroy mobs, short term group splits.