Which spells do folks consider worth learning or upgrading ?

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I am liking distortion spells more and more.
-Trap is great, does huge damage and takes all their action points.
-Phantom is excellent
-Hypnosis is ok if you find right sized stack
-Magic Spring is must for longer fights for non mage.
-Ghost blade is pretty good single target damage spell
-Geysir is area damage spell that you are guaranteed to get so you can count having it.

For warrior I am getting distortion 3 first. For mage chaos first is probably best since you have fireball from start.