Hearthpwn

Well, i also looked up how to beat Rend, but as i dont have Diablo yet i managed to do it using Samuro, Xyrella, Velen and Anduin, also had Tirion & Cariel but they didnt see combat. Used mirror to tank the killing blow 3 times in a row while Sam also had the windfury boon and with Xyr i grabbed the boon that makes blinding luminance hit the neighbours too. Hope it helps someone :)

Heh, i also had trouble with it, but i was lucky to get on 2 of my mercs the valanyr treasure that fully heals all party. Only had to use one of it and it healed the bombs as well and i kept them alive till the end, 3 mercs died but from the start  imanaged to grind him down with Anduin and finished him off with Millhouse.