I've been having fun, and good results, with a very simple list that doesn't require any gimmicks or many upgrades.
Lieutenant tavson with Captain Phasma
3x PS2 generic TIE/SF with special forces gunner.
Does it have the best Dice Modification? No, a simple focus is fine. If you're lucky, they'll shoot tavson to get some extra actions.
You can fly it in formation or not, though I often fly my SF's in formation at least until the first engagement.
Just get as many shots as possible, use that back arc when needed, try to keep the Upsilon relevant. Whether that's taking shots, or keeping his action for coordinates and such, Jam is pretty handy.
5-0 with it so far. I'll probably rotate it out so my play group doesn't get sick of me, but i'll keep it in mind for bigger tourneys.