The potion of gain energy has a minimum substantial percentage of your Pw pool that it will refill. Like healing potions, it will only increase your maximum Pw if you would have gone over your maximum.

Buff the potion of gain energy so that it refills around 100 points of Pw. If this would take you above your normal Pw maximum, you get temporary Pw equal to that difference.

The blessed potion of gain energy gives temporary sleep resistance.

Dipping mundane tools into potions of gain energy charges them with the same beatitude as the scroll would. Possibly extend to magical tools and wands, but only allow the uncursed charging effect.