WZ Skill Usage with Different Weapons through WZ edit?

I've been trying to get a few skills to work using different weapons in v176. In this example, I was using Blaze Wizard's Oribital Flame skill. I'm trying to use it with any other weapon other than staff/wand, and it doesn't want to budge no matter what value I change the weapon / weapon 2 to in the .wz/xml, and I get no different results if I completely remove the weapon/weapon 2 line from the .wz/xml. Is this something that is just coded into the client? If that's the case, why include a weapon line in the .wz if changing it does nothing?

EDIT: Ok, I'm assuming I need to make a client edit for this somehow?