You could possibly combine Temporal Manipulation with the JKK Jacket for two Point Shots a turn. Considering the math you will spend roughly the same AP as a normal AR attack for two possible crits. You could use SMGs as pseudo melee weapons with Spec Ops. Spec Ops, for that matter, together with the cooldown reduction from TM, Future Orientation and Grenadier will give you permanent flashbang incapacitation and you can go to work with Commando in the mean time. Quick Pockets, a powerful pistol in the inventory and Execute can help with some enemies/bosses/arena fights.
There are weapons available without crafting like the Syg MPX or the Steyr-Auch. Although high Mechanics will give you the best stuff, considering all the other skills you might want with such a build you might have to settle down for those. Don't worry; they are very good, regardless.
