Vampires: trouble restoring life force?

Thanks for that advice, to "tag-team" the friends of my Conscientious Vampire who is also a Messy Feeder. I do that already, in terms of going around to visit different friends in series, taking a feed from each until the need is met for a while. I was just hoping that the bonus I chose, of being able to manipulate life energy (as described, to either drain it or restore it, even for the purpose of replenishing willing hosts out of courtesy) would be usable, and so far, it seems it is not. Hoping someone somewhere knows how to make it work for replenishing hosts.