I got kinda of worried when I saw those warriors pop bladestorm and the scene cut out before you could tell how it turned out. I guess evasion was on cooldown? Then again you can't dodge attacks from behind and any decent melee in arena is going to be on your back the whole time you're visible so I dunno if you can ignore them even with evasion.

I think the healer makes or breaks this team. You almost have to go druid for the stealth and the cyclone/root melee peeling.