nekomata fuyu
Mongoose
Nothing gives greater protection than being stuck behind a dust cloud in the corner of the table, with noone being able to shoot at you. If the Admiral has fleetwide abilities, this won't lessen his effectiveness, and in a War5 game, you won't miss the firepower of such a small ship. If you had put him on a War ship however, you couldn't really afford for it to be hidden away from the game, so it would potentially offer less protection.