Highest ranked in our clan only use wiz and it's getting more and more difficult to get support as firebat wd from clan or friends list.
Thats on HC.
But basically you need IP from supp barb and healing from monk, what dps you add and/or a third supp is up to you.
There are a lot of options up to 80, at 85 it gets pretty narrow but I did 85 with firebat/monk/barb and firebat/monk/monk/barb but you can even run sac garg on 85 so ....
Also assume most who are past 90 have atleast one in group who use HUD, seems it's not detectable still.