Well their isn't much difference from the builds from 75-77 to be honest. Can you afford savage or fiery? If so I would stay safe with fiery in my opinion and use this build as a base

Full int build -

9 buffs
1 Rev
7 Heal
9 Drain
9 Fire
9 Frost ( The one that shoots a frost bolt )
9 light

Use the remaining points on the Aoe frost attack and debuffs if you want but personally you don't usually have much time to use debuffs as a int Mage so I don't use them