Nothing stops you from doing touches at 11 stacks since it will do massive quality. my Focused Touch does around 3100 from stack 10-11 for example. Additionally, You will use a lot of cp rebuilding the stacks as well as having to use all 3 buffs again. from doing an extra couple of touches. It depends how far away you are when you get to the finish :P

Also, the new skills may be overpowered, we don't know yet!