Basically get three gear pieces that increase either movement speed or sprint speed, then buy them all asap.
Then choose to get the Level 5 helix upgrade Welterweight, which causes each of his passive stacks give you additional movement speed.
Then just sprint everywhere and be a nuisance. Literally assassinate squishies like Marq, then sprint away at high speed. Its like playing as Caldarius, if he was designed to be melee, lol.