New and improved sac helped a lot for this! (jk not really, sac stood alone in a corner most of the time)
So as you might notice, doing it 6 loot took quite a while but we did it!
few interesting things: you can hit through the cursed invulnerability if you hit in close combat, not sure if this is a bug or not
But the weirdest thing is that when osa resummoned panda, he passed his first turn, but he also created a glyph of his own and the Jackalnubis didn't respawn for the rest of the fight. (also we only had to use 4 glyphs to vuln the boss) Iop died because the boss apparently also has a 4 range jump spell once vulnerable.