I used JKL, JKR, JKA, GMY & Jolee. It’s just a matter of the Geos taking out someone other than JKL, JKA & Jolee. Once they do, JKA gets the bonus turn and Heroes Arise gives JKL his first turn. Mass stun and it’s easy from there. My squad is R5-R7 but the R7 doesn’t save anyone for more than a turn or 2.