It's a bit embarrassing really, having done all the missions, in platinum arena, and doing well in most places. Somehow finishing nightmare with 2 heroes is hard for me. 

Must you need life steal gear? 

Heros:  

[Def] Valkyrie, Martyr, Wurlim, Rhazin, Tyrant, Tyrael, Inferno Baroness,    

[Att] Brakus, Cillian, Foli, Cupidus, Nethril, Astralith, Lua, Aothar, Royal Guard,      

[Sup] Arbiter, Psylar, Mausoleum Mage, Miscreated Monster, Stag Knight, Vrask, Apothecary