my suggestion to fight him from the Tunnel in the middle seems to be the tactic for doing this legit (see link) Also; it makes sense as how SomeBlackDude was able to get more damage on him.......... BUT again its all about the DPS - to bring his shield down. the longer it takes to get his shield down, the less time our Sword Guy, has to spam attacks (R2) basically; the guy with the Sword (SwordBearer) can begin spamming R2 (PS4)/ RT (XB) immediately when shield is down, instead of waiting for him to get this knees. this is what we missed, i believe.