Note that escorts can provide valuable assistance to Starfleet and help them buy you more time to evacuate.
Heavy Fighter squadron. (can be increased thanks to Vega escort synergy)
Destroyer squadron.
Light Battleships. (capital ships: can receive bonus from Ionguard escorts)
Super-Battleship. (capital ships: can receive bonus from Ionguard escorts)
Light Fighter squadron. (can receive bonuses from Vega escorts)
Battlecruisers. (capital ships: can receive bonus from Ionguard escorts)
Super-Battleship. (capital ships: can receive bonus from Ionguard escorts)