Archmage, every time. Beyond that, i switch between the 15/15 resistance one, the new unit power one and on some rare occasion, I may take favor towards a god. Last point is usually extra starting gold, for no other reason beyond just taking something with the last point, and it does buy 2 settlers...
Edit: to specify, I take the 15/15 when I want an early game advantage, and the unit power when I plan on a longer game.