1) Face your characters in the opposite direction.
2) Resurrect.
3) Press the autorun button (so that your characters start running away from each other)
4) Repeat until both characters are far away from each other and possibly hide behind something while the warrior attacks 1 of them.
5) Resurrect and use hearthstone.
6) Invite a warlock to your group, resurrect and summon. Or go to a summoning stone and summon yourself. Of course this only works when the warrior doesn't kill you within 10 seconds or so :P Try to crowd-control him as long as possible when this is the case.