For me, fleet composition revolves aroung the flagship, and some flagships can break some ships, since I use mixed fleets that can actually fill every role during a fight, for example:
My normal flagship is the
Odyssey, as such I need something to take damage until I get behind enemy lines, as such I will prefer ships like the
Onslaught and
Paragon, while also needing extra suport from fast ships, since Odyssey is a fast ship itself, which means I want someting like the
Aurora or the
Falcon, let's say I use the Paragon for the Anvil, I can bring in one Aurora, to go flank with me, and one Falcon to suport the Paragon, and still have DP left for two
Herons, equiped for bombing runs and one
Condor equiped with fighters and interceptors, and that's 200DP, since Odyssey costs 45DP, the Paragon 60, the Aurora 30, the Falcon 15, the Herons 40, and to finish 200DP the Condor's 10DP, this is a very strong line breaker, basically you can overrun the enemy lines and pick the weak carriers first them go back and hit the their capitals from behind.
But that would not work when I want to use a
Legion(XIV), as my flagship, so I want the enemy to break itself tring to break my lines
(WWI wants it's strategy back), and for that I need more heavy ships, as such I can bring in two
Apogees as the Legion alone is not enought to hold the lineand since I want the enemys to break thensenves in the process, let's bring in an
Astral to use it's bomber complement as a means to help to the process, since I don't need a carrier to send Fighters dawn rang, that's part of the Legions job, and to finish we have two bean suport
Tempests and one HVD
Hound(A), this one has 3 ships to keep the line and 4 ships to help the line be mantained, it also costs 200DP, 40 from Legion, 36 from the Apogees, 45 from Astral, 16 from the Tempests, and 3 from the Hound(A).