Actually this is not bad idea to replace 3% crit from set bonus with 15% mag defense and could help a bit.
What about giving that mdef to barbs also instead of the 3rd bonus stat...?
WB has a lot of phy def(too much in true form) and not enough magic resistance..they get eaten by some magic classes(WF, MG, EP) and metal damage from seeker/EA.
Just sayin. Dont hate
A wiz, in order to tank sins, has to be HA mage, considering that only wiz that tanks my sin is Tetai and not for a long time, since he used a hybrid mode of HA with AA mg, geting sh1t load of pdef and dealing 25k critics instead of 35k critics, yet its a lot of work and in the end he still dies. MG is squishi against DPH sins, and if sin plays well, fcked up by aps ones aswell. MG is still mass pk class hehe