I picked up both core sets and an extra TIE Fighter expansion and here's what I ended up with. Going to try it out in a few hours but if there are any owned (or cheap) suggestions for improvements I'm all ears.

First constructed (98)

"Epsilon Leader" (21)

Weapons Guidance (2)

"Omega Ace" (21)

Wired (1)

Mauler Mithel (20)

Marksmanship (3)

"Howlrunner" (20)

Swarm Tactics (2)

Backstabber (16)

Swarm Tactics an Epsilon Leader benefit from formation but I think I can also play enough of these outside of a tight formation if needed also?