I actually switch through all 4 elements a lot against anything that is at least veteran. I play with scepter and dagger offhand.
I tend to ride the lightning to a target, blind them, blow them back.
switch to earth, through some bleeds on the target, blind them again, knock down, switch to water to drop the ice blast for damage vulnerability, switch immediately to fire and drop circle of fire field, phoenix, arcane wave, and the fang spell in rapid succession for a lot of damage and 9 stacks of might use fire grab and switch back to air for another lightning blast and the channeled lightning tends to build up high damage and finish them off.
now if i fight any regular monster, i just kill them really fast with whatever element i happen to be in still. a lot of times THAT is still fire because the ring of fire/phoenix/arcane wave/fang kills any regular mob in 3 seconds.