Yeah. Maimizer works for equipment, but any item which grants an effect does not work yet.
We need to look at all items which grant an effect (potions and consumables), and for those effects, list exactly those items as granting it, and for all other effects that list an item (not a skill) as granting it, remove the items.
I've been hoping somebody else would step up and take that on, since I am Way Busy, but if nobody does it before this weekend, I'll take a look.
tl;dr: maximizer works if you look only at equipment.