Kanan - Fire control system, Twin laser turret, rey, ret spec
Fenn Rau- VI, m9g8, weapons engineer
Captain Rex- Sabines materpiece, tactician, hot shot blaster
The idea is rau locks the 2 biggest threats and uses his ability as often as possible, while rex and kanan do their thing. Hot shot blaster is cheap insurance for keeping rex's condition up in case he gets outflown.
Come at me 2x large base!!