[simply Nathan]

I think the standard skill-based magic is the best for wizards, but I don't like applying that system to clerics and druids. I always considered it a kludgy hack in D&D that clerics used the same basic magic system for their miracles that wizards do for their spells, so in GURPS I prefer Holy advantages like Higher Purpose, Faith Healing, True Faith, and Blessed(Heroic Feats), and the Divine Favor system.