Avayu said:
The Circle of Magi is supposedly the easiest area. There you also get your first real healer, so that will make the battles much easier.
you also get a bunch of free stat boosts.
Use Area spells whenever you can. (I liked to cast some through plot/locked doors and take out enemies before they can do anything)
Use rogue/mage sneak attacks to start battles. Sometimes,you can off Mages before the battle, so they can't annoy you later. This makes a nice pincer attack with your rogue on one side and everyone else bullrushing from the other (aside from the mage who can chill (ie use frost spells) in the back row.)
Blood magic is useless.
Don't play as a warrior. (your party consists of two mages and two rogues each with very different default leveling patterns, eveyone else is a warrior/meatshield)