Do you ever choose Witches over Sorcerers when playing as the Legions in the first game? Under what circumstances?

(Witches were changed in the second game, presumably to be more useful.)

It depends on what opponent I'm facing on whether or not I go that route. Generally, against Undead I use witches.

Interesting. Care to elaborate on your strategy there? Off the top of my head, I can picture that maybe Witches are better against Templars than Sorcerers are, but maybe you have something else in mind.