[Neomi]

Psionics can be annoying, but as a Cleric/Mage you will have more than enough summons to handle all the mind flayers the game will send at you. Skeleton warriors seem to be immune to many of their attacks, and Mordenkeinen's Swords are even better. Protect yourself and the rest of your crew with Chaotic Commands and commence to bombard the flayers with missile weapons while the summons hold the front line. I only used the greenstone amulet a few times before I decided it was a waste of time.