Funny you should ask
I was faced with that situation last game. Here was my solution:
Assault Carrier Squadron (8#, 150 pts)
1 Rhine Class Assault Carrier, 130 pts
1 ATTACHMENT: Wächter Class Escort, 20 pts
Battleship Squadron (1#, 200 pts)
1 Imperator Class Battleship, 200 pts = (base cost 190) + Shield Generator 10
Fleet Submarine Squadron (2#, 165 pts)
1 Sturmbringer Class Submarine, 165 pts
Battlecruiser Squadron (1#, 110 pts)
1 Königsberg Class Battlecruiser, 110 pts
Support Cruiser Squadron (3#, 255 pts)
3 Donnerfaust Class Support Cruisers, 255 pts = 3 * 85
Frigate Squadron (4#, 120 pts)
4 Arminius Class Frigates, 120 pts = 4 * 30
Corvette Squadron (5#, 100 pts)
5 Saxony Class Corvettes, 100 pts = 5 * 20
Sky Fortress Squadron (7#, 150 pts)
1 Imperium Class Sky Fortress, 150 pts
Total: 1250 Points
Basically, I swapped the DN for a CVA and a BB. Seemed to work ok!