You should go minimum amount of DEX, not regular DEX. For example, if a level 100 top requires like 130 (or 140???) DEX, just add to DEX according to your DEX equips, most likely, Zakum helm, scrolled jump shoes, and DEX earrings.
My input, I would have gone No-DEX if I was more funded in Bellocan, but I wasn't so I'm going some-what regular DEX.