I'm lv 26, and I've got a new power to pick up. I also have 3 points for Ranks/Advantages.

Currently have:
Munitions, Super Dex, Super Ego, etc.

Gunslinger
Two Gun Mojo (Rank 3)
Killer Instinct
Quarry (Fair Game)
Shotgun (Rank 2)
Mini Mines
Smoke Bomb (Never used...if I respec, might not take)
Lead Tempest (Rank 2, Tread Softly)
Toxic Nanites

Not sure what to pick up exactly, I like keeping with the theme of shotgun/two guns, I might pick up Breakway, but I have trouble aiming it in the testing area (seems to just hit a few random dummies) etc...

Dump Minimines (at least unless you have tested it on PTS and still enjoy.) smoke bomb can go as well. Snag some Gattling Gun, perhaps a self heal like resurgence? Consider Sniper RIfle (if you can afford to fire it outside of combat, since it breaks on being hit and is 5 sec charge)

My self heal is the Fair Game perk from Quarry, currently. It doesn't seem to be scaling as well as it looked (it started a bit over 10% of my HP, but the amount healed hasn't actually gone up, now it's like 8%)