Ideas noted and changed appropriately, perhaps Sap could read more like this?

Energy Sap: Flare can concentrate and absorb heat from his surroundings causing him to gain the Charging status effect. While Flare is Charging his defense is halved and he gains all the damage he takes or deals during this time is taken as charge. In addition he can not use basic attacks or abilities. Flare can consume this effect to deal damage equal to the current charge he has in addition to his ATK value.(Energy cost: 6)

Also for Warming up, the reason I wrote it like was so that it applied to both energy expenditure as well as energy stealing effects.