Strength- Mainly for 3 debuff. You can drop some if needed.

Range- 1 uses it for grouping radius, 3 for harvest radius.

Efficiency- Neutral. We have equilibrium to facilitate ability spam

Duration- For the debuff duration on his 3. You can go lower, but try to stay 70%+

Remember to use synth deconstruct + synth fiber on your companion, for equilibrium

Arcanes (over eruption)-
Energize- Drop equilibrium for streamline if using this

Eruption- minor cc, makes gameplay a bit more comfortable

Guardian- for health tanking, with adaptation over rolling guard, and anything over catalyzing shields

Reaper- Same as guardian

Playstyle-
You should already have your frame using gloom up, meaning enemies are moving at 5% of their normal speed, giving you some solid crowd control. Use his 1 to group enemies, then nuke them with a heavy from your claws. Shield gate with any of his abilities

Shadow Claws Build-
https://overframe.gg/build/456690/shadow-claws/6-forma-shadow-claws-build-12x-heavy/