You'd need to be very careful you don't level up too fast, otherwise you'll be in a world of trouble.
Alchemy is not a good idea as a major in Vanilla because of how fast it increases, and same with Conjuration. I'd recommend leaving these two as minors so you don't have to worry about them padding your level any.
As an Altmer, I'd stay away from the Apprentice, 25% weakness to all elemental effects +100% weakness to magicka is rather crippling (but if you want a glass cannon character, the Apprentice might actually be the best choice for the Altmer). Give an Altmer either the Mage or the Atronach, and the Breton the Apprentice.