Very easy to beat last boss. All you need are 3 healers all "ALONE" type and 1 sacromage. Healers have to be level 21 with best staff and sacromage just needs decent mage. I say 500 stat is more than enough. First step is to get all 3 loners stuck on the wall in the begining room. Then take off running with ur sacromage and confront boss. If done correctly, your healers will be stuck in room 1 while you are in the boss room soloing boss. During boss fight, it is very important to always run away from boss and click meteor shower as he is running towards u. Then immediately click heal from your healers special and repeat process. U will have infinity health and if done correctly you wont get paralyzed by his purple special which binds you. With this strategy you dont need students with stats 999. You can easily do it with noobs.
Valthiria's Victory quest doesn't work. I choose my army and it when i click embark it goes into a small acting scene and then goes back to the college....no quest.