Stamina- Resource Concept

I've always thought that it was odd that there is no stamina resource per se. Energy isn't necessarily what I'd consider Stamina, so that's why I decided I'd create this resource, and see what you guys do with it.

Stamina- Stamina is a resource that scales with max health. It is designed to have a large resource pool, but it regenerates slowly. All healing effects return Stamina at 50% of the health return, and Stamina only "naturally" regenerates due to the Champion's own Health Regen.

**Potential uses: **

1. Champions that use sustained damage could use it over the course of a teamfight to utilize the full array of their abilities, which would have inherent health regenerating capabilities to help the champion survive long fights and keep his/her window for using abilities open.
2. Basic attacks could expend Stamina for increased damage, granting Fighters and Marksmen the ability to increase their damage potential.
3. Tanks and Healers could utilize Stamina pools to give themselves or others bursts of healing at a great cost to their Stamina.
4. This wouldn't be a resource for burst champions, as energy makes much more sense for them.