Ok. I will make ships with Null-Space Cannons on them. Those will literally gut that starbase. Shielding and regenerators are wasted space against NSCs.
Try replacing a some of the weapons and shields with a pile of Massive Mount (with extended range!) repulsor beams, and/or a stack of wormhole beams. The enemy ships will have a devil of a time getting close enough to fire the NSPs.
I suppose you could mount Wormhole beams on the auxiliary platforms too.
The starbase can easily handle the few ships that actually manage to come into the bases extreme range before getting warped away again.
Wormhole beams are like engines for bases allowing you to keep away from the enemy.