I think that the ISA needs a decent Command ship at War level that can keep up with the White Stars and Gun Ships, but also has anti-drakh capabilities built in. Going with that, something like this would be a better fit:
ISA Ranger
Speed: 12
Turns: 2/45
Hull: 6
Damage: 35/5
Crew: 45/8
Troops: 3
Craft: 3 Thunderbolts
Special Rules: Adaptive Armor, AJP, Flight Computer, Self-Repairing 1d6, Command +1, Interceptors 3
In Service: 2270
Weapons:
Improved Neutron Laser rng 24 F 4AD Beam, Precise, SAP, TD
Molecular Pulsar rng 15 T 10AD AP, DD, Precise, Anti-Fighter
Fusion Cannon rng 18 F 4AD AP, Mini Beam, TL
Fusion Cannon rng 18 A 4AD AP, Mini Beam, TL
Fusion Cannon rng 18 P 4AD AP, Mini Beam, TL
Fusion Cannon rng 18 S 4AD AP, Mini Beam, TL