Hiya,
Aww, no one likes Magma Bomb? I simply love that spell, it is my absolute favorite. I had all of my characters learn it so I could unleash them one after another. I usually roll it down hills, or stand up on a ledge and let it drop. Once you figure out how it strikes, you will never miss with it! So, my three are:
1. Magma Bomb (of course!)
2. Lifesteal
3. Meteorstrom
Generally speaking, I didnt use a lot of spells near the end of the game, preferred to use weapons and such, like for fighting mantraps. I learned all of the spells, but most of the low level ones I didnt hardly use, some never at all. I guess I just like melee fighting!
Scronan