Laning time
Losing against tanks Instead of Tesla Bullets
Midgame Prioritize Fire Rate and Quickilver your Card
Lategame/Snowballing Snowballing take Glass Cannon, Shadow Weave/Lucky Shot for ambushing, takes defensive items if you are being focused
Situational/considerable Escalating Resilience for brawling bullet-heavy enemy teams, Metal Skin if you're getting hosed by Bebop or assassins, Reactive Barrier if you are getting stunlocked
Build Description
Kill them as quickly as possible and leave.