So I love this game but have been playing only casually with friends. Recently our local store announced a doubles tournoment (75pt each, can mix factions ie one player scum the other imperial or something like that).

I run scum (have a few imp and rebel as well but not much) and am just looking for a good list I can build for 75pts that should work decent in a less casual setting.

Any ideas?

I would suggest keeping points somewhat low per ship because you're likely to face swarms. If you put 50+ into a Ketsu or something else, it's likely you'll lose it pretty quick. I'd keep it simple, and try to partner with someone good at jousting:

Syndicate Thug (Y-Wing) - TLT, Unhinged Astromech, Vectored Thrusters 27 (x2)
*N'Dru Suhlak (Z-95) - Deadeye, Cruise Missiles, Guidance Chips - 21

If you're an experienced flyer, throw on the Y-Wing titles to maximize your offense.

I would go for generics with different qualities and tricks, that would be fun flying. A suggetion:

Contracted Scout, Trick Shot, Plasma Tropedoes, EM, K4 security droid, Unhinged Astromech, Guidance Chip (34)
Cartel Spacer, title, Tractor Beam (17)
Syndicate Thug, TLT (24)

Genesis Red (19) w/ Veteran Instincts (1) , Heavy Laser Cannon (7) , "Heavy Scyk" Interceptor (Cannon) (2)

Syndicate Thug (18) w/ Twin Laser Turret (6) , Unhinged Astromech (1)

Zealous Recruit (20) w/ Concord Dawn Protector (1)

Total: 75

Omicron Group Pilot (21)
Darth Vader (3)

"Pure Sabacc" (22)
Veteran Instincts (1)
Lightweight Frame (2)
Adaptive Ailerons (0)

"Omega Leader" (21)
Juke (2)
Comm Relay (3)

Total: 75

View in Yet Another Squad Builder

EDIT: Obviously for your Imperial friend...

Thanks for the suggestions I'll be playing around with each to get a feel for them (modding some lists provided I don't have all the cards) before the tournoment