By the way, these 2 ships are already quite big. Especially Sanctum.
Currently, with upgrades, Sanctum has 400,000+ shields. Automatically gives me 100,000 shields when it goes down. Which is insane. To be fair I'm still in Trinium level. Not sure how much damage I'll be taking in higher tiers but Hyperion v2 only had 24k shields with upgrades.
As for maneuverability, Sanctum's surprisingly nimble. If you watch my video of me building him. He actually packs a lot of thrusters underneath that armor plating. In my opinion, I may have even added too many thrusters.