Pretty much useless “dating tips”, really, because these kind of tips barely applies to everyone. But the mindset is the common denominator here: Dating.
Whether she’s a “succubus” or not, doesn’t matter. It doesn’t matter because she’s not aware of the potentials and the energy currents of these kind of entities. Being “slutty”, or obviously sexual doesn’t equal being a “succubus” either.
Are you doing pacts and lead people to a triangle when socializing on a daily basis? Is that where you take your dates for “summoning” them?
“Please, walk into the triangle. I’m gonna summon you, even though you’re here allready.”
No, you ask her out on a date, like anyone else would have done. If she likes you and if it leads to more dates and, if you’re lucky, a relationship, then you could perhaps share your idea of her being a “succubus”. Common sense, right?