A very similar issue to the Mowzie's mobs issue that has already been reported. Basically, the 1st-person animations added by Wizard Staff are still rendered over the 3rd-person model when using the Staffs and creates a visual glitch that makes visibility for the player difficult. Also, it seems that the 3rd-person model of those items will always collide with the player's head in some situations. In my opinion, the best way to solve issues such as this one would be to create an item blacklist configuration that would switch to the vanilla 1st-person renderer when blacklisted items were held. idk if that's possible tho, so sorry if this just sounds repetitive to you. Here are some screenshots:

So, the Hide Hands mod pretty much fixed this issue as it can completely disable the vanilla 1st person renderer. This mod is still very incompatible with mowzie's mobs mod, though, especially since one of the latest mowzie's mobs updates makes changes to player animations when performing certain special attacks with the "Naga Fang Dagger" and Axe of a "Thousand Metals" items.