Help with my urban fantasy plot

[snowynight]

This's a urban fantasy setting set in recent day New York, with supernaturals such as faerie and mages.
There're three main characters, a social worker suddenly can see the supernaturals, a college student with faerie heritage and a mage who's also a hacker. Right now  it has two main plotlines: different vampires who compete with each other to be the prince of New York, and two factions of mages are in a magical equivalent of nuclear race. However, I can't find a way to connect them. I think of eliminating the vampire plot, but I really like the idea of vampires as a common enemy to bind my main characters together. It also allows me to have a vampire as an unreliable ally who sometimes gets my characters into trouble for his purpose, so I'd prefer to make the vampire plot a bit larger. So help?

Comments

[perfectworry]

Is there any reason one of the vampire princes(?) couldn't try to ally himself with one of the rival mage factions to get his hands on their "nukes" and beat out the other guy?

That's the best I've got right off of the top of my head… Could you tell us any more about the vampires, the mages, and particularly your hacker mage?

[yamx]

I haven't read all the other comments, so this might be a repeat, but--maybe there could be some kind of magical artifact all factions want/need? Or possibly a person everyone's looking for because she could help them with their goals through some power or knowledge.

Well...

[ysabetwordsmith]

Look for resources the vampires and mages can compete over. To identify likely options, consider what religions or political parties fight over. Money. Territory/real estate. Persons considered desirable or valuable. Then again, one group might be thinking about going public while the other wants to stay hidden.

[theoretical_cat]

Maybe (if you want the vampires to be the greater of evils) one of the vampires could be influencing the magical arms race?