Hezens vengeance launcher I think it's called. Hop on a pillar by the middle and fire between the first and second supplicant as they start to move after spawn. You kill all 3 at once. Most MIRV launchers can do this for you One shot. I use blade dance to fake them out if I'm out of rockets. Jump and sky slash as they explode. I get away every time. I just don't like the damage of GG on bosses compared to my regular weapons. For aetheon we have a lock stand on Mars pillar and Titan on Venus while I float between them. We can usually kill him with in 3-4 ports so I frontline supplicants with my launcher 2-3 of the ports before I'm out of rockets unless I miss in which case the other 2 have easy line of sights from the gate stones.