| Spoilers - Highlight to read On some quest spells, for example weak fireball (skingard recommendation) it doesn't matter what level you get them at. At least that's been my experience. Another one is the spell you get from Cheydinhal, bouancy. It's an alteration spell anyways. But a very nice spell called wizards fury, you get after you have progressed in the mage guild quest line a bit, sometime after journeyman rank. Don't remember exactly when you receive that spell. Anyway, if you want a more powerful wizards fury spell, gain levels first, because it is definatetly tied to your current charactor level.
And since we are on the subject of the mage's guild, here's another spoiler you may want to read...The higher your level, the better mage's staff you get when you complete all the recommendation quests. I've read that you want to be level 15 minimum to get the best, most powerful staff
Hope this helps |