Guild Wars 2

Have a skill boost gauge bar that, when filled up, can be used to boost the strength or effects of any of the 1 – 9 skills on the skills bar. There could also be multiple levels on the bar that adds more enhancements as they are reached. Different actions could fill different resulting effects or enhancements of this bar. This boost bars energy could also be transferred into an object that others can use at a reduced strength. Multiple objects could also be made.

So you are discribing roughly the unique mechanic of the warrior, is that what you mean?