Im 10-1 KD in the D11 and thats not 2 missions either......
First tip keep speed up, at least above 250mph ias in the combat zone.
I also suggest the lesser ammo loadout...
It gives a better feel in the plane.
Ammo, Frenchy, etc... All are aces in the D11 its a Great plane.
Talk to them...
Note Your visability over the nose is your biggest asset in the D11 so use it to get them nice shots on the enemy. 8 .50 cals and its game over for them..
2cents
DoctorYo