Originally Posted by
Animeniax
How far later on are you talking about? Because a buddy of mine made a destruction mage and his upper 20s level mage could go into a room and clear it in seconds with chain lightning. Maybe he'd have a harder time with big bosses, but he described how easy it was to kill anything and everything with destruction magic while healing yourself. Plus with bonuses he had virtually unlimited magicka.
I just made my smithing set with all 27% bonus to smithing (I couldn't find the best enchanting potion which would make it 28%) plus a blacksmith elixir (50% improvement to smithing) with 100 smithing and 100 enchanting. My armor rating is 858 and all 5 pieces have dual enchantments in a mix of improve health, stamina, magicka, bow damage, carrying weight, and fire resistance. About to go kill something powerful.
Destruction spells can do a lot of damage because I don't think armor rating protects you from it, and most people don't always wear protection from fire/shock/frost all the time. Plus your health is probably only in the 200-300 range, so a powerful spell can kill you in one strike.