Npole, i think you just didnt learn the Mirage or you just prefer gamy FC3 planes with their magic radars.
Regarding the The 27ER has the advantage of the range, and the AMRAM has the range and pitbull advantage. Head to head, its true that there is no chance.
However with AIM7 and 27R, they are all on par. The Aim7 are easy to defeat and you dont have beam that hard. Shoot and crank, i do that often on Blue Flag against F15 and i often defeat the Aim7 and can git kills with 530D, simply because the F15 are spoiled and used by 120C.
The Aim7 has ONLY a slight range advantage over the 530D, but its insignificant cause long shots are easy to defeat and you have plenty of time to shoot as well and crank.
Just spend more time learning the Mirage, you wont be better than arcade FC3, but you will be competitive...