I think most people (rightfully) call First Aid a dead skill after a certain number of ranks; you reach a point where the only reasons to keep training it are for TPDs or as a requirement for circling. But now that First Aid plays a part in how well necromancers can stitch together their Risen monstrosities I find myself wishing for a way to boost it. Adding +FA to Butcher's Eye via a metaspell seems like a good way to go about it.

I realize that if you also throw Chirurgia into the picture BUE could end up boosting 4 skills at once, but please consider it. If it came down to which one I would rather have: +FA or +SE, knowing what I know now about Risen I would pick FA. But admittedly I say that as someone who only trains SE as a circling requirement.