It's actually much less of an increase, since they don't provide a flat X% damage increase, they provide 1% to X% spell damage increase.
Can we get a list of Slot vs. Subslot? eg. Right RIng, RRing, LRing, RingR, RingL, How do we designate these? Also, what is a subslot, Inventory? bag12slot1 ?
Should be so like on the hotbars, you could see what number that slot has. Example background on head would be 2 (2 is probably wrong number for head)