Dartz could be divine serpent geh, yugi could have been slifer, kaiba could have been obelisk or blue eyes ultimate dragon, and bakura could have been zork or destiny board, but this all works too
Sorry for the late reply, but thanks for your feedback. I think for dartz divine serpent would be good or even shuneros, but The seal is basically in the center of the whole deck. For Yugi it had to be the dark magician since it follows the rule of the 2500Atk. For the antagonist Kaiba it had to be blue eyes because of the 3000Atk.