But, the real question is, how many dots does she have in Celerity?
The problem with a question like this is, whether you mean to or not, you’re basically asking me, “which of my character’s superpowers are better?”
Vampires are rapidly becoming the urban fantasy counterpart to elves. Which is to say, when you use the term, there’s a vague understanding of what you’re talking about, but no uniform, concrete rules.
Hell, when it comes to a vampire’s power scaling with when they’ve fed last, my first thought is actually The Elder Scrolls setting, where feeding weakens them, but makes them harder to detect. While starvation makes them stronger and more feral. But, that one scales over time, not how much the eat.
When it comes to overall power, I tend to lean towards World of Darkness’ generational system, or the idea that they just get more powerful over time, so it’s an age issue, not a feeding issue.
This is all dancing around the point that I don’t know how strong your vampires are. Yes, yours. Unless you’re writing fan fiction, or RPing in an established setting, those are your characters with superpowers you’re defining.
For that, you probably need some kind of system to operationalize your vampires. Your options are to either cook up a system for yourself, or borrow one.
If it’s the latter, then World of Darkness isn’t a bad system to pull from. Basic character generation is really fast, and the system is good for getting a quick feel on what a character’s strengths and weaknesses are. It doesn’t hurt that one of the main games in the series is focused on vampires, so you might end up with some ideas to flavor your setting with along the way.
Vampire: The Masquerade provides the tools for a huge range of different styles of vampires in the core book alone. They’re all, more or less, inside the European immortal blood drinker genre, but it’s still fairly diverse group. And looking at the disciplines (specialized powers characters pick from) should give you some ideas about just how powerful you want your characters to be.
There’s also Werewolves, Mages, Hunters, and Demons. Given the series started in the early 90s, it’s a surprisingly comprehensive look at the common Urban Fantasy lineup. Though Demon: The Fallen was a smaller run, so that one will set you back a bit, if you end up wanting it.
I actually did an article on the setting awhile back, but, right now the main takeaway is looking for a rule system to say, “my character is this strong, and is this good at fighting.”
If you’re familiar with D&D, or GURPS, or really any RPG, and know what their numbers actually mean, then that will probably work just as well for you.
I’m not a fan of recommending D&D for stuff like this because character creation is a fairly involved process. Just crunching the numbers can take awhile. But if that’s the system you know, it’ll still do what you need.
I’m also more of a fan of recommending GURPS for the contents of its source books, over the actual game system. Speaking of, if you want a good quick primer on actual vampire folklore, GURPS: Blood Types spends the first 30 pages on the subject, before going into game systems. There’s also a chunk further in the book focusing on a lot of more obscure varieties of the myth. The discussion on how to make vampires is a little rule heavy, but still worth taking a look at.