Just to add some obvious (maybe?) ones:
Velious armor clickies: Thurg/SS/Kael robes have Rune IV, pants have click clarity for buffing newbs. PoM armor has insta-click misty port, nullify magic and scale of wolf.
Mage focus items have insta-click reclaim if you're using animation pets.
https://wiki.project1999.com/Star_of_Eyes is from Staff of Wheel quest is pretty easy-to-get inventory clicky to reset cooldown.