Weapons for Witches?

I'm trying to make a build for a Witch, but I'm not too familiar with caster builds. Is it best to use a staff? Or a wand and shield? Or two wands? Or does it matter too much?

Thanks!

It really depends on what build you are making. In general, wands have good general spell modifier stats, sceptres are better for elemental damage, daggers for spell/crit. Staves have the advantage of giving you a potential 6-linked gem setup, in case you can't do it on your body armor, or you need an additional one. Must be a real good staff to give up the stats from the off-hand item for, though.