Partially. If you chose weak active abilities, the Tome of Experience is a lifesaver. However, if you misallocated your base stats (Strength, Dexterity, Intelligence) or General Skills (putting 10 points in Ranged on a melee character), the Tome does nothing for you.
The service is not free. The Mage charges a gold fee that scales drastically based on your character’s level and how many skill points you have spent. dungeon siege 2 reset skill points work