If I'm in LANCs my nemesis is anything with cannons or 50cals.
If I'm in a Zeke, Fuel Fire is my nemesis.
If I'm in a P47, Gravity is my nemesis.
If I'm in a Goon, that LA7 that went searching for me is my nemesis.
If I'm in a Spitfire, American Metal is my nemesis.
If I'm upping in defence of a field, the vHorders are my nemesis.
If I'm flying anything else, my own SA and ACM are my own worst enemies.