your flexdeck idea is an good one, but 2 of the 4 need no deck penetration IIRC. also, I don't get the shape of your structure: the hangar is as wide as the outher hulls, while the bridge is only as wide as the central hull...... while there are no corners in it, but still it can follow the shape of the 'bridge' towards the outriggers???
also, you have space for 2 (maybe even 3) helicopters with this hangar arrangement, maybe put some weapons at the side (if you want 1 helo) or centrally (if you want 2), for example that millenium gun.
for guidance: I would at least have the following: an air search radar, 1 director for the gun, and 1 for your stanflex load (in case you carry SAMs or another gun)
btw, keep in mind that all in this post is advice, do not take it as 'I have to change that!'