[T.K.]

Hmmm...if EVERY mage in the setting needs to meditate to recover...isn't it just a setting feature, costing not points?

By what the OP said there's no other way to replenish energy, so everyone would abide by these laws. If that's the case, you simply define how it works and there's no need to stat it, isn't it?

Also, even if that's not the case, I believe you people are forgetting the fact that by the base system a mage already has the ability to regenerate his ER, so this form is a worse form of Regen and thus should be a disad not cost anything to the caster, as all the builds were done so far.

To me, if you want to stat this, you should first define what a "normal" regen rate would be, for example, 1 ER every 2min (what could be achieved with the Energy Recover Spell), calculate what that translate into points if your using, for example, Spell-as-Powers approach and THEN limit that to requires Meditation and everything else you want it to work.