While having extra items working with the Potion Belt would be nice, what we really need is MORE Potion Belt slots! On raids, I'm already up to 6+ items for my belt, and with a current limit of 5 that isn't working out so well. Right now I'm using: Distillate of Celestial Healing XIV, Molten Orb, Lava Orb, Summoned: Elemental Ice Shard, and Rod of Ethereal Transvergence. I don't have a slot for my Cloth Cap and it makes me frown. This doesn't even count superfluous clicks like Distillate of Spirituality XIV, Distillate of Clarity XIV or even Spider's Bite VI.
...put together a case if you have a clicky...
For new clickies, I completely agree with Tiny Companion from any item with an instant cast time being Potion Belt enabled, especially considering that no Magician would use the item from Discord Tower that has this ability.
While it would be nice if all inventory-clickable items went to the Potion Belt, that doesn't seem like the intent here. They want clickies that don't really have a place anywhere else... those that you don't normally sacrifice an inventory slot for.
I'd like to see the following Potion Belt enabled:
Tsaph Katta's Urn of Rejuvenation
This has been requested Potion Belt enabled since it first came out. The devs didn't seem to want to do it, but now that they're asking for more clickies... this is at the top of the list. It's just too situational to waste an inventory slot on, given the amount of charges and recast. You can't bandolier it. You only need it when you're in a rush. This really, really needs to be Potion Belt enabled.
Firestorm Torch
This *could* actually be used as a DPS clicky if I had room for it.
Dog Whistle
This needs its cast time REDUCED to 1.5 seconds and needs to be made Potion Belt enabled. It would be a perfectly valid DPS clicky in that scenario. We're mages, we like pets.
Clay Bracelet
Barring an AA equivalent, instant-cast time Eye of Zomm is great, but I rarely have room for it. Putting it on the Potion Belt would be a godsend.
Tear of Tranquility &
Scale of Rodcet Nife
Same justification here as for the Urn. These are just so situational because of the large recast that you really can't dedicate a slot to it. Since both are reaction mechanisms, bandoliering isn't the best option. I'd like to see them on the Potion Belt.