Reset the Cooldown of Overcharge and Blitz Upper when you Teleport using Rune of Travel.
Rune of Travel
Increase the duration of Overcharge by 0.2-1s.
Increase your maximum Ammo by 4-20.
Generate 5-25% Ultimate charge after getting a Killing Blow with Blitz Upper.
Gain 8-40% Lifesteal while Overcharge is active.
Gain 10-50% Lifesteal while at or below 40% Health.
Looks like a weird build but just try it u will see