Every The Legend of Zelda: Tears of The Kingdom player (myself included) have this issue: sage abilities are hard to activate when you need it, and you always miss clicking when you don't need it - Tulin, please stop blowing item on the ground!
As a UI Artist, I came up with the idea of making a Sage Wheel similar to the ability wheel of Link. So when you want to activate any ability, you just need to select sage from there, and that's it. I also designed the stages when you didn't acquire the sage yet or when you deactivated one from key items. I hope you like it!