That being said, let's notice that there are rules to create +10 caster's level items (or rather, there's an associated enchanted properties' cost; also, the level increase may be for one list, for one spell type, or for all spell lists) or +10 ESF items (ring + there are spells that decrease the ESF modifications, thus have the same effect as increasing the ESF roll), but I can't find how one could create (going "by the rules") +10 BAR items. Is there any spell that gives a bonus to the BAR?