For mage, if you're trying to Solo, I'd suggest your first 5-10 points into vitality and the rest into intelligence.
If you want to just catacomb, then go ahead and pump the intelligence.
For a barb, try and get about 50-60 dexterity, and put the rest into strength using strength charm and Enhanced effect armor and enhanced effect axes.
Those are my personal builds for those two characters.
PM me with any further questions.