Me and 2 clanmates did it with no stair hiding last night. Void primaries for scions, hunger of Crota and ice breakers for other adds and valus. Hide behind barrels and walls on top level with one person always on add killing duty. 2 of us running singer with hopf and Max discipline equals 12 fusion grenades each per radiance. Each super would drop about 1/8 of valus health. 3rd person was Titan running blessing to help with rocket splash damage. Dude was dead in less than 10