Yo I got a location suggestion

Paradiso, Nevada

A large city in the middle of Nevada where corrupt mercenary group Maniacles Corp studies the supernatural, producing weaponry and optimizing their mercenaries to optimize profit. Many mages and vampires live here, and the Progenator Gods (Oldest Gods) have many cultists here as well.

Another

Merlinus Island

An island of mages on which one of the most prominent magical schools exists. There is a big city, and three towns in other corners of the island. The jungles outside the towns and cities are known to be full of criminals and cultists.