Monks, and Puppetmasters, with no spell casting ability and Rangers, with the exception of /nin sub can equip this, but why can't Ninjas? This has always irked me since when Ninjas are tanking the last thing I want is to keep getting hit and interrupted while trying to recast utsusemi. C'mon SE patch this up so NIN can use too ;>.<; (And hurry up with the PUP, COR, BLU updates... we need some AF and gear that actually compliments these jobs.
I got VERY lucky and synth'd about 7 of these in a row while power leveling. I sold them at the auction house for 10k a piece, they all sold in less then 2 vandiel days!!!! 70k revenue isn't too bad.
It's not really THAT worth it unless you're doing a lot of soloing or are a rdm who casts while meleeing. If you time your spells right, however, you are very likely to rarely get interrupted (at least for the earlier spells, which I assume you will be using since this is a lvl 8 item).
I bought this for 8k at the sandoria Auction house but you might be able to find it cheaper at any of the major cities. Since i have had this it has served its purpose well, interuption of a spell is allways an unhappy time mind you 8% isnt that great but combine it with a spell like Aquaveil and you have a great combonation. lets see them interupt you now.