Remember that if you link a rote spell to a focus item, you can't cast the spell as a rote spell, if you don't have that item. That means, of course, if you are linking a rote spell to 2 focus items and you only have one of them, you can't cast it as a rote spell either.
Dual wielding Wands can look pretty awesome, I think.
Besides:
Isn't Molly dual wielding in her one-woman-rave?