Destroyed 10 starfighters while drifting in Dogfight

I think the most overlooked part is the "in dogfight". You have to get them playing dogfight, else they won't count. My best shot at this was playing bomber (Y-wing or Tie-Bomber) and using the multi-lock missiles (cause they lock on very fast). I would fly around damaging enemies or looking for already damaged ones, fired missiles, and performed a calculated drift just to get the "kill" notification while the engine boost lights are all flashing like crazy. If you still don't know what a drift is or how to drift, there's plenty a video online on the subject.

Dealt more than 50,000 laser damage in a single match

Another misleading description... this is how it should go: Dealt more than 50,000 PRIMARY WEAPON damage TO STARFIGHTERS'S HULL in a single match. That said, my best shot at this one was playing New Republic fleet battle against AI. Normal difficulty, so you can deal more damage; Y-wing with rotary cannon; and simply focus on starfighters. Don't bother with capital ships or flagship, just set the objectives aside and let the game go it's course. Shoot down as many AI or AI Players as you can. You should get the achievment around 50+ AI kills.

Destroyed a disabled starfighter 10 times across multiple Dogfight matches.

Once again, you have to get them playing dogfight, else they won't count. Best shot at this was playing interceptor (A-wing o Tie-Interceptor) with Ion Cannon and barrage rockets. The recipe: disable using ion cannon, then release a barrage of rockets at them. Make sure you disable the target (it takes a couple of shots). NOTE: a ship stays disabled for a very brief time, so if your target is at full hull, you can start firing the rockets just a moment before it gets disabled; that way the killing blow will surely be dealt while disabled.