That's a much harder question to answer I'm afraid, and it's much more dependent on other gear and members of the band as well. Are you in control of this mix? If not, who is? Do you have a spare aux mix or two on the mixer? Every mixer? How will the rest of the band hear your bass?
To get you started I have a band member who uses and likes the Xvive system (which is a good budget option), I use a Sennheiser G4, something more mid-range in price.