This is the docked arrangement of the Photon and Mjolnir classes. Even though individually both classes are termed general purpose vessels, this particular arrangement is generally used as a powerful battleship. In tactical strength this is slightly more powerful than the Exodus class itself, since even though it lacks the extra phaser arrays and photon torpedoes of the Aviary and Bat classes, It's much less vulnerable and several magnitudes more manoeuvrable.
In normal operation as soon as the Aviary class is separated, the Photon class also keeps its own warp engine idling to facilitate rapid separation of the Photon and Mjolnir classes for multi-vector tactics.