Yeah, if you want Ryn to have high confidence and high libido, you'll have to alternate between, say, massaging her balls and leaving her (+confidence) and massaging her balls and stuffing her (+libido).
If you're trying to grind her libido up or keep it level, don't cuddle after hugs. The hug itself grants +confidence; the cuddle lowers libido.
There are no fully comprehensive Wiki articles, because that would be one hell of a heroic task, but the outstanding
Etheryn one is just about as close as you can get.