IMHO, the important thing for any character you envision as being a 'pure magic' type is to choose the atronach sign: nothing else will give you sufficeint magika.
As you know, the magic skills depend on 3 attributes: intelligence, personality, and will power. So long as you have at least 1 and preferably 2 skills from these attributes IN YOUR MISC category, you can train them up to assure yourself of 3 5x multiplyers every level.
In terms of weaponry, doesn't matter much: Personally, I like long blades, though many feel a mage is incomplete without a staff of some sort.
Thing is, its VERY easy to train up your weaponry, and there's no reason you can't have 80 to 100% skill in several by the time your at level 20. You'll get a counter towards a % increase every time you strike with a weapon, so using as low a grade as you are comfortable with for a given enemy will get you as many 'bumps'as possible.
Ditto magic: very important to make 'practice' spells for all categories you can, ones that do 1 point of damage [or healing], 1 second of water walking, etc., and cast them repeatedly till you run out of juice. Run to the temple [or Imp. cult altar], refill, and recast 'em: you can build skill pretty fast that way, and I though boring, I actually think its faster than buying training in terms of 'game hours'.
Oru
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