http://dnd5e.wikidot.com/wizard:evocationEmpowered Evocation
Beginning at 10th level, you can add your Intelligence modifier (minimum of +1) to one damage roll of any wizard evocation spell that you cast.
This alone surfice me to pick Evocation over others.

I wonder how it will work for Magic Missiles ... twitter and reddit seems to be a little inconsistent in how it should apply.