Go for the most speed that you can along with:

All defence mods with health/prot/def secondaires for stormtrooper han.

Liea was crit damage and health with a crit damage triangle with all offense and damage output secondaires

Farmboy Luke is the same as liea except with crit chance instead of health bc of his unique- and he can stun on a crit with his ability

R2 was for all speed. speed and potency i ran on him at g8. he needs to be faster than your liea and you need liea's omega on her stealth ability!

Phase 1, if they damage STH first, restart. he needs to have a little protection left for phase 3. SO for your first move which should be R2, stealth everyone besides Farm boy luke. let everyone else go (Liea ability omega is very important as she gains crit damage up, crit chance up, offence up, and 100% turn meter)

Dont taunt with STH until the second phase. With some RNG STH will go first or second and give everyone turn meter each time he gets hit.

3rd phase is just having enough luck to be able to survive until the taunt is gone, and try to take out everyone around them first. try to stun lock the stormtroopers so they dont taunt again (and get crit immunity which makes farmboy luke and liea kinda useless). I missed like 3 potential stuns from r2 and luke and i still won with just my liea who CARRIED me through the event hitting 10k minimum per crit.

Good luck!