Shaco: My one problem with his ult

As a shaco player, I play him mostly jungle, and mid when I need it, but I never go as an Ability Power shaco. Overall, he is quite op if you know how to play him, but I do I have one bothering concept that I don't like about him. It would be his ultimate.

9/10 shaco players (Statistics for dramatization) play shaco AD. I think it would be appropriate to give Shaco an AD ratio for his Ultimate. Keeping the AP isn't bad, but the AD ratio would be a larger benefit to him and his team if he ever needs it.

So, would anyone else agree? if not, argue why.