Alright, so upon further reflection I'm not allowing players to start with Essence 4. That can be balanced when you don't have flaws in the equation so players have to burn most of their BP, but with people allowed to take as many or a few flaws as they like, people can have a ton of BP leftover after buying Essence 4.
As for your character, Enchantress, I went over it with Andy's character already, but I'm not really allowing the sterility flaw for Abyssals. Except maybe as a one-dot merit. Otherwise, you're just going to have to avoid that sin against the Neverborn the hard way.
I don't think I'm going to allow your two Vampire: the Masquerade flaws. As Zaer suggested, you could take the Silver Prince as an Enemy or with the Wanted flaw. The Permament Caste Mark flaw also gives you two points and is kind of what you were going for. People won't recognize you as an Abyssal, but they'll think it's a tattoo so most people who don't like Abyssals might dislike you. On the other hand, it can still be hidden.