Build for my Nikana Guide.
Primed Reach - Increases AOE so you hit further and hit more enemies, which helps build combo count quickly.
Blood Rush & Weeping Wounds - Scales with combo count.
Condition Overload - Provides insane scaling damage with status procs
Organ Shatter - Increases the damage of critical hits
Gladiator Might - Further increase damage of critical hits
Berserker - Highest Attack Speed boost, can be [Primed Fury] instead if you prefer the consistency.
Final slot is a flex slot ([Primed Pressure Point], [Sacrificial Steel], [Drifting Contact], Riven)