Any abnormally high damage taken or slow regeneration may be a bug or glitch with the save/game, but you do not have enough options as a dragon to be able to create a poor build, even if you wanted to.
In D2:ED you can choose which skills to boost with points and armour, but in FoV you start will all skills maxed, so the only choice you have is between armour that does either +40% HP or Mana, and either +40% Offense or Defense.
The only thing you could do differently for the dragon is to run around Aleroth going through the caves (etc) with respawning opponents, in order to level. I got to level 47 during the dragon escort, and I suspect getting more than a couple levels higher than that would take awhile in Aleroth, and wouldn't necessarily make a huge difference.
