It still fails to explain what forces they compose of. 10 cruisers can be mentioned as 10 warships.
Minimum composition would be several corvettes (I know the GVCv Maahes and the GVCv Thutmose were alive, though damaged, not sure if the GTCv Actium and GTCv Warspite were still in the nebula), a few destroyers (GTD Aquitaine, GVD Psamtik, GVD Toeris) and a bunch of cruisers I'd guess. They did say they were launching co-ordinated strikes throughout the nebular theatre, and I assume there was at least 1 corvette at each engagement [Fenris and Leviathan cruisers would get creamed since they are weak].
The thing is, whoever gets the drop on the other will come out on top. The ambushers can sortie bomber wings to disable the enemy beam cannons and fighterbays, and busted fighterbays = no backup besides subspace reinforcements.
Colossus wins if it jumps in besides the Sathanas for a few minutes of broadsiding, + bomber wings to handle forward beams and fighterbay. Sathanas if it gets the jump, just like during 'Their Finest Hour', though the necessity of bombers for it isn't necessary (though normally you can't disable a Colossus, 3 of its engines are invulnerable).