Carrier Battle Groups obviously aren't entirely about the carriers.
A Vasari CVBG would consist of 1+ Skirantra Carriers, 1+ Antorak Marauders, and then lots of Lasurak Transporters, some Ravastra Skirmishers and a few Stilakus Subverters.
The Lasuraks, with Fighter and Bomber Squadrons divided evenly, would provide the core firepower of the fleet. The Ravastras with their speed and AntiHeavy weapons could hunt down enemy flak. The Skirantras would put up their own Fighter Squads, provide Repair Clouds for the strike craft, and maybe even put up a Microphasing Aura. The Antoraks would provide a necessary speed boost with Distort Gravity to get the carrier fleet away from direct-firing enemies, and along with Stilakus Subverters, they could make attacks on the enemy fleet with Defeat Shields, Distortion Field and Phase Out Hull to amplify the effectiveness of strike craft attacks.
An Advent CVBG would consist of 1+ Halcyon Carriers, a Rapture Battlecruiser, lots of Aeria Drone Hosts, a group of Iconus Guardians, and some Disciple Vessels.
The Aerias would carry the Fighter/Bomber Squadrons which provide the firepower, the Guardians would use Shield Projection and Repulsion to protect the fleet from direct-fire opponents, the Halcyons would provide some stronger squads with Adept Drone Anima and some bomber defense with Telekinetic Push, the Rapture would obviously use it's Concentration Aura, and the Disciples would hunt flak and provide an antimatter tank for the Guardians and caps.
The TEC would depend on Sova Carriers with Heavy Fighters and Rapid Manufacturing for any degree of air superiority, and their Percherons would thus have to be all-Bombers or with only a few extra Fighters for anti-LRF duties. The Cobalt would be as effective as the others in flak-hunting with it having the same speed. But the TEC support cruisers don't have abilities that really support carrier fleets much. On top of that, their normal(non-Heavy) Fighters and their Bombers are kind of lousy.