This looks to be a great set to replace the basic Moldavite/Int +2 Earring combo for BLM's & SCH's without a Novio Earring & maybe even great for resist builds. Assuming of course the set isn't a ridiculous pain in the *** to obtain.
People need to keep in mind they're still getting 5 MAB total with BOTH earrings, making Moldy + Novio/Crapaud give higher MAB. But that 5 M.Acc is pretty darn attractive, too.
You would swap this in on something like Kirin or any HL NM/HNM to assist with magic accuracy. +5 is alot if you're not getting buffs from somewhere else.