I'm pretty sure if you are 100/100/95, doing any desynth on the 95 will drop another desynth 100% of the time. If the game can't drop anything but a 100, that will fall. I'm pretty sure there is a way you can desynth to get another skill to level 1, drop wvr to 94, then your next wvr has to drop the level 1.xx afterward.
XI Wiki



