Ya that video was of my guys - I seem to use too many different names :P
I did too notice Desecration is insane on an elite pack, especially if there is 4 of them. At that point your option is to run around and let a few stacks float on the ground - run in and DPS - when the hp starts dipping cycle through serenity on each character while making sure inner sanctuary is up for the 35% reduced damage. I can usually net about 7-8 seconds of pure DPS in this timeframe before needing to run out. Wait roughly 15 seconds for the cooldowns to be back up and repeat. It's not the usual face tank but it gets the job done. Mind you this isn't on act 3 - as the kill speed for me there is way too slow.

The way they need to fix desecration is when it's cast by the mob it places the burning spot underneath all players at the same time instead of jumping every second to the next player. Right now I agree it's basically just an endless cycle if there is more than 2 mobs using it.

I think WD's or Barb's would be super fun too. I'm going to keep using my bread and butter exploding palm till it is fixed though and then maybe venture onward.