What do I need to beat tier 5 of Aggressive Negotiations?

"Mephisto_style;c-2099567" wrote:
5* unlock was incredibly easy as I recall. You probably could do this with all gold mods and right stats

You recall wrong.
It is easy with nute and gba or with a zeta GG.
With OP's current toons it is v difficult.
I had almost the same toons but my ventress was g12+, double zeta'd and it took many attempts.
OP just farm the suggested toons, you'll end up with 2-3 great teams upon completion instead of hodge-podge and Padmè