When i apply skills to rift mage specialization the game freezes.

If you're on PC, right click the game in Origin and select the repair option. Origin will check for data corruption and attempt to fix it.

unfortunatly that did not work but i just saved and put on one skill, saved put another one on and so on. I now have all the skills and it's working fine, however the game never connects to the servers so i can't play mp, but thats a different matter