Just so I can add to the fire, I usually go focused specialist, just 'cuz it's so darn cool. If I specialize, it's either Focused Specialist, or generalist. Focused Specialist makes a huge leap over normal specialist, and I'd never miss dumping evocation, then it's just a choice between necromancy, enchantment, and abjuration to dump. I would specialize in either illusion, transmutation, or conjuration (and abjuration, in rare cases).