Mafia 100. Sylvan: Tree of Life.

Hero player, and if we find a Warlock, would it be beneficial to execute her right now?

Well, what other options are there? There's no point in delaying her execution; unlike the Paladin, she definitely won't be useful for the town. And she seems to resurrect after death.
The only thing is, I'm afraid we won't have enough time to change anything, but I'm all for it.