Me and my brother had one unit each to support, Micaiah with Dual Support + and Sage Nowi, and two units each to attack then die, then get revived Ephraim, My Avatar, Nal'quae (randomly generated streetpass character) and he also had my avatar. Their skills and equipped weapons were:
*My people:
*My Avatar- Griffon Rider- Brave Axe
*Skills: Limit Breaker (maxed), Ignis, All Stats +2, Resistance +10, Astra
*Nowi- Sage- Book of Naga
Skills: Rally Heart, Limit Breaker (maxed), Sword and Lance Breaker, Odd Rythym
*Ephraim- Dread Fighter- Brave Sword
Skills: Ignis, Luna, Rightful King, Limit Breaker (only str. Maxed), Swordbreaker
*I'll ask my brother about his people. I know he had a full team of Grandmasters with Michiah with Thoron and Dual Support +, My avatar and Nal'quae. His version had same skills but without maxed limit breaker. It was halfway maxed. Also we literally slapped five and jumped when we won and got the Excalibur.