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End Game Railfan Battleship with 360 degree weapons/shields @ 266 crew

Battleship
A 6-rail core to deal with anything big, with 360-degree supporting armaments designed to deal with pesky packs and mop-up from the rails.
Supported by 360-degree shielding and flaks, you're protected on all sides.
90m/s forward, 60m/s reverse.
Built to 408 crew, can be run (just fine) with 266.
Numbers in brackets are minimums:
Batteries 48 (24)
Fire Control 156 (110)
Command 12 (12)
Death Squad 12 (12)
Engineering 72 (54)
Trooper Grunts 108 (54)
78% hyper efficiency
4240 full ammo
Plenty of room to add ammo factories (I just buy it) or more storage.
(4-square storage blocks can be replaced for more crew quarters if desired)