Yeah it's possible but I don't think we should give higher levels than what's purposely put by the developers, well, not in the case of HWiz and Prof that is, at the minimum.
nines' suggestion is a good one about trading the protection cards of your cloak for more damage, it's backlash is trading higher damage for being instantly killed by an Asura or to a lesser extent, a Thanatos.
But for giving a Stave Crasher option to the already existing weapons, no. A headgear with, let's say... +20 INT, +10 VIT, +10 AGI, +10% MATK, -10% Cast Delay, 1 Slot, Enable use of Lv 1 Stave Crasher, somewhere along the lines of that, or think up of a different one, say for accessory, I don't know maybe people have better suggestions that would help you.