Just because an item in the high end has mana/int/wis on it does not make it a combo class item.
Every item from the elements up thats all/all or has a mana-bar class on the item list is going to have mana/int/wis on it hands down.
Does that mean that melee (monks rogues wars) aren't allowed to roll on any of it? No, didn't think so.
Kyvik Oom
"Outragously Overconfident Monk"
Karana
Elemental Dawn