Commander Luke (L): gives counter and TM. Stun if enemy has Defense Down.
Hoth Rebel Soldier: Tank who has 90% counter chance with Luke's lead and inflicts Defense Down on his basic giving a chance for Luke to Stun.
Hoth Rebel Scout: gives TM to the team on his basic, stuns on his special. And of course gives TM when countering too. Your DPS and TM provider.
R2: fast to Smoke Screen on HRSoldier who counters, inflicts Defense Down, allowing Luke to stun. R2 also stuns on his basic, so when countering too.
Han Solo: stuns on his first shot (for sure rework makes him select whatever toon too). Also gives CC (HRSoldier has 100% chance to inflict Defense Down on a crit) and has +85% counter chance with Luke's lead.