I've been rekt by the grasp for the last time- I'm going to get one! I've done this before but never gotten a usable roll. The technique is simple- three night stalkers (or possibly on defender Titan), each with a raze lighter, using the bow and sword to burst down omnigul before she teleports to the end of the strike. Requirements are that you're a nightstalker/defender, have raze lighter, and have heavy synths. A sniper with surplus on it is also great to have because you'll get more sword ammo from a brick if you have the sniper equipped (the antinomy XVI from new monarchy has this perk). I'd like to do this today and I don't mind rotating people in and out if you can't stay long.