Its been ages since I played my Claws/wp Brute and Spin has a different recharge time it, but FU + Spin + Shockwave can be a chain with the right recharge. I feel like even on my Brute those three worked as a chain. Note, I use Hasten. Focus + Shockwave can keep a boss on its butt if need be. Generally speaking, you take one of the first two attacks, one slot it since you won't need it in the end, skip Evis, and 6 slot if possible everything else. I 5 slot Shockwave with Bombardment and then the KB/KD. Claws is plenty fast enough even using WP and without the FF proc. I say this as a speed nut. I only put the -Res proc on Slash.
Not Claws/wp, but this is how I did my Claws/ea.