Banshee is a really, really good gear set for PVP. The weapon is interchangeable; House and M4, it's just personal preference wether you sway towards the SMG or the AR archetype, I guess.
The skills I recommend for PVP are Immunizer station to get rid of status effects, Booster Shot for damage mitigation and damage increase and Scrambler pulse. I'm sick and tired of Shock turrets, it's cheesy, so I don't even recommend using it.
Banshee is very versatile when it comes to the build. Many things are viable such as 5p Banshee with Barretts vest, 5p Banshee with Savage gloves, - I I - with Refreshed, and my favorite 5p with Vigorous chest piece, though the ladder works best in a group. Then there's a combination of those ^ with 4p Banshee and a mix of the Exotic/High-end pieces, as well as the well known Predshee (4p Pred and 3p Banshee) and Bantor (4p Banshee 3p Pred)