For my Clr 4 (Sun and Strength):
Endure Elements, Prot Evil, Shield of Faith, Remove Fear, Obscuring Mist
Bull's Strength, Endurance, Divine Zephyr, Remove Paralysis
Soon to be added: Searing Light, Flames of Faith, Summon Monster III
For my elven cleric 8 (Elf and War):
True Strike, Protection From Evil, Divine Favor, Shield of Faith
Bull's Strength, Cat's Grace, Endurance, Remove Paralysis
Magic Vestment, Summon Monster III, Invisibility Purge
Divine Power, Greater Magic Weapon
The spells that I think are really must prepares:
L. 1 Protection From Evil and Shield of Faith
L. 2 Remove Paralysis, Bull's Strength, Endurance
L. 3 Summon Monster III
L. 4 Greater Magic Weapon