This one is a bit time-consuming but is very easy. All you have to do is setting up a Dogfight with this settings:
- 1 frag limit
- 1 AI in Rookie level
- You with an Attacker plane (more powerful)
Start, kill the enemy plane, then restart until the trophy pop. You should get a win every 20 seconds with this method.
(c) Linkinito @ PSTO