Int/Dex Mage

[Ellyidol]

Then, in either case, it is still more efficient to go pure Int because of the mana pool increase.

Of course it is. Higher int also means higher heal and spell damage. I haven't seen any new calculations with the stats if dex increased spell damage more than int (via base damage), but until then I'm sure int increases it as much.

Pally beats a pure int Mage in almost every way though after trying it out. I didn't like pallys much at first until I tried it.