Mia bonus, near F2P otherwise

Brave Bow on Lyn, TA Raven tome on Cecilia, Flashing Blade Desperation Moonbow on Mia, and a generic healer of your choice to keep them going (maybe an Elise w/ another Cavalry buff). Slightly weaker than the ideal vs. red, dominant against everything else. Runs extremely well, with consistent A's in speed and survival if player controlled. Similar problems to most teams if auto-battle controlled, but still very functional. Since Mia has the aforementioned build, she can switch between a state of using the desperation to attack only on player phase to finish the opponent, or getting healed and baiting axes and swords. Brave Lyn becomes an amazing Brave Bow user when given TT bonus stats. Cecilia covers pretty much all blues and colorless in one shot, and even deals with a lot of greens if you give her G tomebreaker. I chose Genny simply because she is an ok mage bait with such high res, and also can dish out a somewhat noticeable and occasionally relevant bit of damage with Wrathful Staff.

Brave Lyn

Mia

Cecilia

Genny