Yeah those bunkers aren't worth the hassle, just sit back, let the almighty tumble towards us, when it get's close enough ol' Traveller will just be like "oh for -blam!-s sake!" And yeet the almighty far far away. Personally i'd have extermination squads storming the almighty, wiping out any red legion still on board, then attach engines that can give some deceleration to it by pushing it in the other direction. Once it's at a complete stop well i guess we got our own battlestation we can refit for our own uses.