Orianna No Mana
Okay so I know this would be a little op but with so many champions not using mana I think it would only be fair I believe that orianna should not use mana but use the same mechanic as yasuos shield gaining more energy the more she walks to use her abilities The reason this makes sense is because she is the clock work lady and a robot of sorts she doesn't seem like a mana using champs and this just seems like it would only be fair and the more mana increase she gets the more energy she can store and regenerate rate is increased per step this just seems like a good idea