Those items for casters should be categorized "spell spirit", "spell hit" and "spell" instead of "spell spirit" and "spell dps" as some items in the "spell dps" category are good for healing and some caster specs use (and are intended to) "spell spirit" (instead of items with hit) for dps. Distinguishing between "spell spirit" and "spell dps" just promotes the misconcepion that items with spirit are only for healers and are the only items they should use, which is not only false but not intended by blizzard.