Emblem, 320 artifact and 320 sniper dropped for me for completing the challenge + 310 artifact and 310, 313 heavy as raid reward :) One idiot died just before the second aura, so it is safe to say that dying is allowed. Another idiot messed up with the plate during the second glyth and had us to retry the sequence. Luckily we managed to beat warpriest in 2 runs and everybody was happy.