High in level

About a game

There are wizards with different levels. Level 1 wizard level 2 wizard level 3 wizard and so on the higher the level the stronger the wizard.

Would it be correct and not stilted to say-

My wizards aren't as high in level as yours.

Which is correct?

There are wizards with different levels
There are wizards of different levels.
There are different level wizards.

Thank you