um each of the new augment-able pieces of mage gear from delve get +13 MAB, +10 INT +10 MND augmented on top of base stats when all the way up the MAB path. this should make fully augmented set of delve gear BIS for nuking gear set.
only one that seems close to me is
yaoyotl gloves vs Bokwus gloves fully augmented for another 13 MAB and 10 INT
so 13 INT 15 MAB vs. 17 INT 13 MAB and Bokwus doubles as being great for healing
the better question is will these all be replaced before you get them as it will take quit a lot of delve to get the full set of gear and a decent chunk of money to buy enough airlixers to upgrade them all to full.