How to build a character like Tracer from Overwatch?

Tracer is essentially a two-handed pistol(ish) wielding heroine that is best at hit-and-run tactics.

She is incredibly quick, using short distance teleports/blinks to get in, unload all her ammo in a split second and then retreats with more blinks or uses her longer cooldown ability to turn back time and regain a former position/health state, using the time to reload.