You've gotta farm it my friend! Two Guardians firing a shot each from the Golden Gun with Celestial Nighthawk can kill her INSTANTLY this week. Or you could run Nightstalker for Tether, Gunslinger for the Golden Gun shot, and Hammer Titan for orbs. We got in a rhythm last night and we're able to down her SO quick and reset each time with our supers up. This week is a VERY rare combination of Omnigul on Nightfall (which increases the drop rate of the strike-specifics) and Solar Burn (which makes her SO easy to kill). Don't miss this opportunity to farm efficiently!!! It probably won't come again before Rise of Iron! Now, get out there and grasp the Grasp!