thanks for the suggestion. another thing is, how many vets on the fighter pilot to become competitive in gb? i know the answer would be subjrctive...yeahh just give me insight. 

i think 120-130vets is good enough. thats just my personal opinion.

Well there is no limit other than the vet limit but i'd say 149 vets should do it.
Personally i have 200 on my pilots and they still die in fights against USN unless he's not microing. 

depends on nation...

for air domination with T4:

for US with 149 (150) vets you'll do fine... for IJN at least 199 (200) to compete with 149 vet US. Of course more = better so with time and using burning events on your favor the end of the route its max vet avaiable for every fp

for hunting bombers and scouting with T3 (while doing your grind):

put 109-120 vets and you'll be fine, and of course you should never head south if you are not an at LVL PCV or biggest CV on your team (biggest BB and therefore biggest CV will mostly go south)

PD: do not forget to carry a +12 fighter stat (or elite fighter) seaman, it will help a lot and maybe make the difference

as far as killing t5 scouts i dont see why a mn fighter could not chase them down, to me the secound in speed when compared to ijn, have miro'ed very well when up against ijn, wind up out running them, only to spin around and chew them up, and that was using a crew that was mostly +10 and +11s of course i had the seamen and was vetted very well.  Cant wait till i lvl new crew for my lib.

US>KM>RM>SN>MN>IJN>UK for fighters.

US: Has higher then average stats in all areas, making them versatile and deadly opponents. They can drag, counter-drag, and dog-fight well.

KM: KMs advantage is their sturdy planes. They have enough defense to last in dog fights with all the nations. They are also slower, which makes them better draggers.

RM: Much along the same lines as KM. Their planes are very tough, but not quite as tough as KMs. 

SN: SN has tough planes that pack a punch. Theyre planes are also quite fast, useful for counter-dragging.  

MN: MN is the all-rounder of the bunch. They have average stats in all areas, meaning they do everything well, but are beat in all areas by atleast one nation.  

IJN: IJN have the fastest planes, with the highest fuel times, but have a lower defense. They make excellent scouts and counter-draggers. 

UK: UK has average/below average scores in all areas. They can do a little of everything, but are bested or tied by other nations.  

But to be perfectly frank, each nation has its advantages and play style. And as long as you class them on time, your fighters will be competitive. Sorry that i can't do bombers, I'm not much of a bomber myself. Most of my info comes from looking at stats, and my experiences in-game.