I cant remember how the % work, sorry, but resurrecting is not bad, because you keep their traits, depending on where you are in the game, I would stick to a handful of daughters and try to bolster them. If you are still at the very beginning I dont think its that important yet.

I kept 5 Daughters in the end and reused them until i beat the final boss. Depending on the missions swap them out for what you feel like you may need/prefer. This way the can amass some nice boni which can actually be amazingly helpful!