Pretty good game. I started out making Tristam a warrior, Kaeli a rogue, Phoebe a healer and Reuben a mage, but ended up respeccing Tristam to a mage instead for AoE.
At level 10 everyone except Phoebe will get their AoE's and from there on you can just AoE down the mobs you encounter. I ended up just running past a lot of mobs to get to the end, and as a result I fought the boss at just level 15. I stocked up on Ether, Potions and Revives and pulled it off by using Kaeli's sleep skills and the mages' slow skill on the boss, and at the same time buffing my party with Kaeli's haste, Phoebe's Harden and the mages' Magic Up. Then I just nuked the boss with the mages' skills, since magic doesn't seem to break sleep. Took me a while though :)
Also you can equip the Exp Ring on one character and have them upgrade the items (except for weapons) for the other characters, since that character will be higher level than the others. I didn't bother though.
I really enjoyed the game, but I'm a bit disappointed with the "legendary bow" that you get in the game. I played the game as a ranger, and I ended up buying a bow that had the exact same stats as the bow you get from the Warder questline, for about 1500 coins BEFORE I even completed the Warder's last quest. It made the questline pretty pointless, which was a shame.
Completed the game with a warrior and used Alyss, Brendan and Andras.
Only took +strength on level up, and grabbed as many +damage items as I could.
Encourage from Andras, Burning Weapons from Brendan and Seethe + Anger from my warrior, followed by Whirlwind and Reaper = win :)