I'll just go over this now since it will be a lot easier for those who choose magic systems. There are various elements in the Elan Universe though the important ones are the magic focus. The elements are: Inferno, Mountain, Aqua, Vortex, Vacuum, Darkness, Electricity, Miracle (healing/barrier magic), Light and Force

Offensive wise the opposing go like this:

Inferno - Aqua

Darkness - Light

Vortex - Mountain

Electricity - Vacuum

Miracle - Force