Hokay. Update. The classes have all been beefed up, with the changes following here:

Voidmage sage:

Prerequisites: Added "Spellcraft 2 ranks"

Abilities: Added "Might of the lost":

Might of the lost (Su): At third level of the class, you learn how to empower yourself with the arcane energy drained from your enemies. Whenever you counter a spell, you may increase the DC of your next spell equal to half of the level the countered spell was, to a minimum of 1.


Breathdrinker:

Abilities: "Sudden gasp" now deals lethal, untyped damage and can be used three times per day.

"Devour their energy" has been added:

Devour their energy (Su): At the time you reach second level, you can cause all enemies within a 10 ft. burst become fatigued unless they succeed on a fortitude save against DC 10 + your primary casting modifier, by literally sucking out the air from their lungs.


Wistful Mind:

Abilities: "Think twice" is now usable as a move action, and can regain spells of all levels.

"Trained tongue" added:

Trained tongue (Ex): At second level, you have delved into enough secrets, that you have now become trained enough in another language. You gain a bonus language.


Acolyte of the Forgotten:

Abilities: Plunderer of minds added:

Plunderer of minds (Su): Even better than to steal others' knowledge, is to claim it for yourself afterwards. Once per day, you may counter a spell as an immediate action. If you succeed on this, you can regain a lost spell from the same spell level as the one countered.


Mind haunter:

Abilities: Added "Faceless devourer":

Faceless devourer (Su): At second level, you have learned how to veil your own appearance from others after having used any spell messing with their mind. Whenever you use a spell with the [Mind-affecting] descriptor, the target(s) of the spell must succeed on a DC 10 + your primary casting modifier will save, or you are effectively invisible for all purposes for those persons until your nex person.

Example:
Allaren and Teserian are both affected by a spell with the [Mind-affecting] desciptor, casted by Zane. Allaren fails his will save against 'Faceless devourer', while Teserian succeeds on his. Allaren can't see Zane now, and Zane is effectively invisible against Allaren, and Allaren suffers all the penalties associated with that. Teserian, who succeeded on his will save, can easily see Zane, and fights as normal.