After my matches last night against multibocks
I changed a few things.

1 I set up another dps spam key 2 step that calls obliterate 2 tmes and 2 blood strikes in a cast sequence then in same cast sequence blood tap, howling blast empower rune weapon then let's it reset. And then calling frost strikes and dark sim on round robin.

I'de target the healer first Spamming that cast sequence as an opener often meant destroying the first target and stealing some good defensive cooldowns. And then just going back to my aoe spam, imo the best way to add obliterate into your dps is just to add another key for it.

Spam a big burst on someone like that then switch over to aoe spam and you'll put their healer on his toes. Makes for a good kill more often than not