Well done, yup, Cerberus has low vitality, but be aware of Edea, I used the Auto-Reflect strategy on her, and then two things can happen, she starts use a lot of dispels, or she starts use Maelstrom like there is no tomorrow, I don't remember if last one was reflected (two years from last time I played the game ). The both are just perfect strategy to battle her, but Maelstrom will let you at low level for a physical attack. Anyway, you can give it a try, because the auto-reflect strategy is one of the best versus magical enemies