This poll is not quite right, the credits do not greatly influence the fighters, because they are generally inexpensive. This poll should be about the drivers you use, because these are depleted faster than the credits.
in the case of cruisers and frigates, is the opposite, most of these are expensive and consume only units, then the credit dries much faster and pilots are left over.
For me fighter spam is use 75% or more of your pilots. When i try fighter-bomber spam tactics i use:
30% of my pilots for Interceptors (fast and laser fighter)
30% for Fast Raid Bombers (superfast fighters with only one rocket launcher)
15% heavy bombers (shielded or armored torpedo fighters)
Sometimes Support fighters (faster, light and laser painter equiped
And the rest for cruisers and some support frigates equiped with emp and shield disruptors, making easier the assault for fighters.
Recently im testing the “Lore Fighters” tactics…
^EDIT: sorry, lure, not lore xD