Best Weapon for a Swordmage?

[Klaus]

But a glaive is two-handed. So you lose your +3 to AC.


This one, I don't get. What does a longsword have to do with a wizard?

Swordmage -> Multi into wizard -> Wizard of the Spiral Tower -> Longsword becomes wizard implement, nifty sword powers.

 

[Danceofmasks]

Main class has to be wizard.
Spiral Tower only allows a longsword to function as an implement the wizard specialises in.