I just started labbing her yesterday, so tech hasnt even crossed my mind yet. Lol. I was just curious on your general thoughts about her and specifically her Shotgun variation.
Well, in shotgun you're going to live and die by the stun and BF4, probably one of the best combo enders in the game.
F1,2,2+4 is nice launcher that's variation specific, you can capitalize on it mid screen with a run combo if you're into that(kind of hard online and off), but honestly you can just be lazy and hit them with the stun right before they land and get your combo that way.
BF2 can also be used this way, in that you can stun them before they land for a combo extension.
F1,2,2+4 really gets it's use in the corner because it pops up so high.
B2 is B2, amazing, and if you hit the sweet spot you can also get a stun off of it.
114 is the simplest, easiest restand string, 114 xx db2, free on everyone. You'll probably also catch people blocking it high and you'll trip them with the low shot.
Everything else is pretty much the same.
DF2 is okay, I only ever use it if I feel ballsy because it'll usually push a standing opponent right into stun range and you can pop off that low shot fast enough to interrupt whatever retaliation someone might want to throw at you.