I have all my taunts on a key, and the other characters use the same key for debuffs. So the tank will spam out 3 or so taunts and the other characters will throw in 1-2 debuffs, then I switch to nuking and after about 10 seconds I re-taunt the abilities that popped up and go back to nuking.
It goes smoothly for the first 10-15 seconds and then it just breaks down.