The problem with this is the fact that it would be totally broken in PvP. I feel like the most you should ever be able to get from an activation is 50 percent being only if you activate and deactivate immediately. What I imagine would be the best way to do this would be subtract the percent you us from 50% of the bar. (If you use 25% of your super then you deactivate you gain 25% back. I you use 1% of your super you get 49% back. Since you can’t be negative, if you deactivate after using 50% or more you’re out of luck, or maybe you could gain a flat buff buff to recharge rate on your abilities instead.)