If you're hoping to avoid destruction magic? Run. Seriously, there'll be an insane amount of running involved. But also remember that dragons are faster than you are. If it's flying up from behind you, don't try to outrun it. Turn around and run towards the thing, and within seconds it'll have flown over you and have to come around for another pass. You'll take a fraction of the damage. If it's hovering and glaring, then you get as far from it as you can - its concentration attack has a limited range, and its distance attacks - massive blobs of shining, shimmering
splendour death - are hella easy to dodge.
Hiding works great too, if you can manage it. Be mindful of your surroundings; keep an eye out for rocks and trees, forts and shacks, guards and spouses - anything that will give you shelter for a few seconds. Your summons will make for great dragon fodder, too. The stronger they are the longer they'll be able to distract it. Which ones work best is sort of a wash - a fire atronach may be able to deal more damage to a frost dragon, but it will also be less resistant to the dragon's attacks as well. More often than not a storm atronach will optimise damage dealt vs. damage taken.
Staves are great and all, but unless you're good with the school of magic anyway there's really no point. You'll get a dozen or so casts and then you're right back where you started. You'd be better to consider becoming good with bound weapons. Any character without a ranged attack is really spending more time hiding and running, either to or from the dragon, then they are fighting it. And a conjurer can't run out of ammo, can't be disarmed, and doesn't have to worry as much about having to lug around multiple weapons.
Other than that: fire, frost, and magic resistance are your best friends. The Lord Stone would help with base damage resistance, but the Atronach Stone will give you specialised resistance to its elemental attacks while at the same time replenishing your own mana reserves, which means more summons. If you have the Aetherial Crown you could use both. Which is probably the way to go, even if you just toss it on when you meet a dragon and wear something else the rest of the time. Beyond that, robes and such enchanted to buff your resistance is key.
Edited by Hyacathusarullistad, 22 April 2014 - 06:40 PM.