Forgot to mention that you should always get nimble with Moji. Cauterize is my main pick up after the nimble.
Also you can fire your utl a long way so dont be afraid to use it from distance to shut someone down for a bit to give your team room to recover. I think its 500 units but you can test it out on the training range. People think you have to get the kill but shuting down a sniper for 4 seconds can have a pretty big impact.
I sometime do this so i can get close to them, cookie run to them and they come out and have a moji in there face, the best place to be as moji