Guitar Hero inspired champion

What if there was a champion whose abilities could be clicked for one ability or held down (both leading to the ability to go on cooldown) for persistent effects? At first level he could only have a single persistent effect active at once but while he levels up, he would be able to use more persistent abilities eventually able to do 4. However, his ultimate might consist of using either R or T for separate but similar effects. not sure how or what his abilities should actually BE but i thought this might be an interesting way to play a champion, moving your fingers for separate buffs during fights or clicking different ones for a skillshot or something of that nature. let me know what you guys think, any ideas would be much appreciated and I'm more than happy to hear any input from anybody.