Does it have to be done on hard or can you do it on normal? Best bet would be Crota normal I would say (that is if anyone out there can remember how to do the bridge legit!) I've done Crota from beginning to end in less than 30 minutes so if you mess up its not too long to go through again, we only realised at the end that we would have done in flawless if we hadn't of cheesed the bridge. I solid lamps, we cheesed the bridge, no-one died at Ir Yit and the swordbearer we had was a monster! Nearly killed him on first sword! VOG quickest run I've done is 45-50 minutes. More can go wrong in the vault I feel.