I am baffled by this, baffled, and hopefully there will be some insight here: I understand that class-specific bonuses are not present on any of this equipment, but they are wholly worthless as sets right now: the belts have terrible modifiers as it is in general, and their set bonuses are nonstacking: why use a two item set to achieve less benefit than the basic lore item you will wear anyway? It doesn't make any sense.
Is this an oversight? A mistake? Is the prc related bonus when the savants/archmagi/etc are added going to be so awesome as to make this utterly craptacular belts useful?
It was disappointing enough that not one single one of all these rings was cha 6 / cha +1 like wizards get with archmagi, that they had worthless wizardry 6 on them so they had no useful effect whatsoever, but not even achieving the set bonus will make it worthwhile? I used a charisma ring before, so I'll use my set ring (probably earth, since its a nice +1 constitution), but its incredibly disappointing that casters get completely worthless sets, and that the sorceror ones are so unbelievably poor.
Please tell me this is an issue and that the set bonuses are intended to stack.