I mark, but only 1 + 2. I mark 1, tomahawk, OP OP OP, rotate and mark 2 and combo. If the 3rd is not slept I gain some on them or just rotate through. As MOBS die I remark in larger trash packs. Have not had any higher end experience though, so it may change.

The hard part is consensus on sleeping. With WAR, OP does wake them, I do have flash, but often it is not too much of an issue as groups can kill off trash without the sleep.