It seems that there are no specialisation options for mages anymore.
From what i have seen so far, all spells have Intelligence and level requirements.
As a mage, you just need to put one point into every spell school and take the 3 strongest spells of each school available at your level. You get the strongest healing spell for one skillpoint, tha most damaging spell for one skillpoint, ...
This makes mages extremely generic. Any character with enough intelligence can be an all purpose mage with very little investment in skillpoints.
There is no real advantage if you specialize in any one or 2 of the spell categories. You can equip the full arsenal of given element, but the jack of all trades mage will have even more variety and will most likely perform better in combat.