[Stratos]

Mage, definately. Not only are there some interesting spells out there, but mage also relies on stats that opens up alot of the game. If you want to get the most out of the dialogues and quests in the game, a high Intelligence and Wisdom score and a moderately high Charisma score is needed. The other stats play a lesser role in PS:T, with the possible exception of Dexterity.

There are some combat in the game, particularely in the second half of the game, but that's what you've got party members for. Add to this that you're immortal in the game, you die but automatically gets resurrected at certain locations, and that you slowly regenerate wounds at a rate dependent on your Constitution.