Sasuke first is great at 9 tails and pve, but in pvp it's autoloss against Hinata and Neji and few others, and his Kirin will get overridden by other field skills that are normally higher up in move chain.

You want something like Neji in his place or ideally Iruka if you have him, that way you can cancel Hinatas or Fire Mains seal and etc or just lower certain ninjas health so your main will aim for them with assassination sword.