We all know that we don't need Fiery Attack and the 55WIS & 1INT skill at last of the fire element intro(i forgot the name) to increase our own damages. We already have/will definitely have Hotfire Attack, our goddess skill, the best of the damage-increasing skills.(3x of damage.) and We only need fiery attack to use it at bursting sometimes that's why we need it. so We really dont need to have 55 WIS for that last fire assistant skill. But if you want to have MDEF, if this is your point, then you can add to WIS. But masters in forum don't recommend it, since each point you have each level becomes really important. :/