Primed Reach will help you be able to hit more enemies more quickly. (+6 Range with Evos)
The 8th mod slot can be replaced with a faction mod for more targeted damage. A [Fury] mod for just more zoom zoom. Corrupt Charge if you are aiming for a heavy strike spam build, this will allow you to have a base of x3.
Melee Duplicate Only needs to reach Rank 3 for a 100% chance.
Evolution I : +3 Range & +40% Attack Speed.
Evolution II: Whirling Fury - Additional +20% attack speed. (Total of +60% attack speed without mods.)
-= If you feel you have enough attack speed because you are using My Melee Gauss or My Warcry Valk Build Try out Drifting Grace: +20% Sprint
Speed & +20% Slide. The additional movement speed will allow for quicker missions and less time between another enemy to hit.
Evolution III: Adept Reflexes - +15 Initial Combo
-= Combined with corrupt charge, this brings initial combo to 45, which hits the 3x heavy attack multiplier mark.
Evolution IV: Swift Transmute - Reach 3x Combo and Heavy Attack to activate Incarnon Form
Evolution V: Kinetic Harmony - +100% Heavy Attack Wind Up Speed