i did exactly what you're doing. for my character, i pumped up int first (obviously) and then survival, str and dex (str&dex for equipment purposes). i had one mid-level fire spell for general use, one high-mid level earth spell for tougher opponents, and hammer and lightning jacked up for really tough encounters. quite frankly though my dk warrior did the vast majority of the heavy lifting with sharpened weapon, one hand slashing focus and shield. no real need for alchemy as you find plenty of potions and can buy what you need/can't find. i'd stay away from summoning skills as they only apply to one doll and can't be sold. by the time you get to end game, you'll be so rich you can freely sell off any skill and buy another if you feel the need.
