Right now myth Draconian has 475 health and I think it's weird since the Life Draconian has 450 health. I'm suggesting to bring his health down to 425 since Myth forms should have less hp than Life forms. You can see that the "middle forms"(Ninja Pig, Minotaur, Krokomummy and Draconian) are kinda sharing the same amount of hp, for example Fire Minotaur and Fire Ninja pig have 425 hp, same as Myth Minotaur, so I think it would be fair to give Myth Draconian less health. In the class of the "little forms" (Fairy, Rat Thief and Elf) you can see the same pattern where myth shares the same amount of hp with fire (325 hp for fire elf and myth rat) and they both have less health than life fairy.
In conclusion, it's weird that the fifth class with the most health shares the same amount of hp with the second class with the most health (being Balance).