Do you prefer warrior, thief or black mage for spellsword builds?

[Lostname475]

I usually go with mage but I can see an argument for the other classes

 

[Upcast Drake]

White mage is really good at it from what I've heard. And I think Charmer can even have a go at a "charmsword" build.

 

[Lostname475]

I was excluding white mage because imo that's a paladin, not a spellsword.

What would a charmsword build look like?