As "bad" as people may think this is for BST, the CHR and DEF are really the best for the BCNM20s, and getting an MP boost on anything with decent DEF is hard to come by.
Nice piece for BLU at lv20 that can be used for a quite a while. HP and MP are great and CHR+2 helps with Bludgeon (CHR is a modifier) which is a huge spell for BLUs at those low levels.