Focus generating auto attacks for magic weapons

I originally posted this idea in Aord's thread about pure mage builds, but I wanted to make an official request for this.

An idea to make pure mage builds a lot more realistic to use, and in reference to the focus regen nerf, I think it would be very nice to give wands and staffs a ranged auto attack that does not do any damage, but instead generates focus by a small flat amount or percentage per successful hit. The focus generation could be double for staffs.

I originally though of it siphoning the focus from the target but that seems like it would be a pretty powerful effect to have, especially in PvP. I would also assume an effect like this to consume reagents of some kind, but the idea behind this change is to make it so hitting 0 focus in a fight doesn't mean running in circles waiting for death or enough time to cast another spell.