If you take notice the two times you have Estinian in your party (well, once under your control, once in your party) he's actually FAR more powerful a dragoon compared to the hero of light. While the Hero of light has more options, multiple classes, and Estinian has only the dragoon soul, it's as if he took everything we spread out and focused it into one singular task. I think we'd have trouble in a 1 on 1 fight, until things were desperate and we called in reinforcements or hydalin.