Get some of the best skills very early in the game, just practice. In the first level, find an enemy respawn point near a save point. Once there, keep attacking until you run out of AP and save the game. Your AP should have refilled, as well as your health. Keep doing this, and after a few hours you will get the special move from Berethor that can hit an enemy five times in a row. Note: This works for all characters, and not just Berethor.