my personal preference build:
Evo I : Incarnon Form (Give 40% Attack speed & 2m Range when activated)
Evo II : Seismic Slam (To increase your slam radius by 50%)
Evo III : Shockwave Synergy (Faster Combo gain method for this weapon in the early with not Incarnon Form activated)
Evo IV : Swift Transmute (For faster Incarnon Form activation)
Evo V : Kinetic Harmony (For faster heavy attack speed)
Swap [Primed Reach] for Faction Mod if you want higher Slash dot (which i'm lazy to swap around for)
Remember to always use primer first before you heavy attack for maximum damage