Cryomancers deal with ice.
Pyromancers deal with fire.
Hydromancers deal with Water.
Petromancers/Geomancers deal with Earth.
Aeromancers deal with Air/Wind.
Necro is dead so Necromancers deal with the undead and level drains and stuff like that.
Umbramancers deal with Darkness.
Entropomancers deal with Chaos.
Lumomancers/Luxomancers deal with light
Electromancers deal with electricity.
Technomancers build robots to help them.
Meteoromancers control the weather, and they probably get paid lots to do it.
Beibermancers deal with Bad Music.
Kanpachimancers deal with Kanpachies. (Cave Story)
Mixermancers deal with mixers?