I'm a free player (well, except for buying a few slots), so I really can't dump tons of fuel into the mega-planes. But I get in my 5-6 sorties a day, so I can plug away at the lower and intermediate ones. I've got pretty much the whole research tree unlocked, and if I don't own a normal plane, I've at least unlocked it.
I'm currently leaning heavy on my Su-34 Black Duck (level 8, 4AGM at level 5) and X-02 Tiger (level 6, 6AAM at level 5). I'd be happy continuing to level these two, but I wondered if I should start levelling another plane to catch up with these two if there's more potential.
I'm pretty happy with the 4AGM/6AAM combo; I still fart around with other planes, and I tried making the T-50 my fighter of choice, but I just can't stand the 4AAM in comparison.
Any advice? Or am I pretty much solid with these two planes?