Observations so far:
My asaaj is lead. She only has a zeta on her unique though. Modded as much offense as I could, but can't imagine how it's possible to reach 4k damage. Perhaps because she's not fully modded to G12.5? Does that make all the difference?
I know about courage and protection up but the above scenarios all occurred when she was both buff-less and buff immune...I've also never allowed them to accumulate courage (beyond 5 attacks I guess because they likely use them up the instant they get them).
Might want to try her 2nd zeta eventually...I just can't link what's happening here - where I can't take down anyone - to the crazy ohko aoes i see the gamechangers pulling off.