i beat skyrim in 20hrs or so lvl 15 high elf dual casting fire (level 1 spell) all throughout, yea i almost didn't complete any of the other quests, i didn't complete the mage/theif or warrior sections (did that after i did the end boss, no spoilers). But yea sounds stupid, but i always kept on using either level 1 fire or level 1 ice (depending on when i upgraded to fire or ice pet, cuz they resist the same element and you don't risk killing them) reason? cuz your hours carl lyda dies from aoe (area of effect) damage spells which are like almost everything upgraded, so i just ran it there and double casted fire or ice. Then later i completed the college quests and the rewards are awesome! i kinda restarted a new character, to be more battle mage, you can have summon sword on one hand and when you summon it, it ups conjouration, and when you swing, there goes your 1h skill, i didn't have more time to play with it though.