Let me put it this way...
Wither is amazing and 10 force is nothing.
Give up the best pve tanking ability of the class for half a trash?
Sin has non-degenerating ressource generation. Its not worth it unless, like deception, the point might as well go there.
So just go to 0, saber strike a few time there. Rather easy ressource management. Its actually the sole class that can do that when I think about it.