Originally Posted by Boonana

With invoker it depends on what you want to do.
If you want damage you go Exort > Quas. If you want utility you go Quax > Wex.
If you want push you go Wex > Quas. ( Forge spirit and alacrity, use it on the siege minion for maximum pushing. ) At about level 16 you can pretty much do what ever you want with him.