Go invisible at the 3rd section away from the door on the right side (looking at crota) the sword Knights don't seem to like to go that far around. run in but not too far just enough to see ir yut shoot 2 rockets. Jump like mad to get back outside. Rinse and repeat. Should take 6 or 7 rockets to kill her. And maybe a few follow up shots from your primary at the end. This is all assuming you kill the right shreeker first, have heavy ammo synth and kill the sj Heaters fast enough to run outside a few times