Enemies are level 33 the whole time, so you'll take more damage than usual and deal less. Knights and Cursed Thralls are hallowed (yellow health bars). No reviving, so don't die. The Deathsinger begins her liturgy sooner. No chalice when facing Crota, so make sure to have a helmet that replenishes health when picking up orbs, or a weapon that replenishes health (Red Death, Suros Regime) or a class talent that does. Use a Super to kill the Knights when in the crystal room, you (or your team) will want those orbs. And most importantly, bring heavy ammo. You're gonna use your rocket launcher a whole bunch.