I'm against using REDMD since it's so ridiculously broken and unfun to use (To your opponent anyway, it's awesome to bring out two major dragons in a single turn, it's awful to have your opponent do that, I've been on both sides.)
I've been using a few hieratic cards in my deck, particularly Gebeb and Tefnuit, I'll take a look at the Elemental Dragons, thanks for the tips.
(Also, what would be the best way to use Dragon's Soul Castle? I've been using it primarily to do shenanigans like revive a dead blue-eyes or my White Night or my Level 6 Horus or something.)
@E: Just tried Elemental Dragon deck with REDMD and my god this is so broken how can this deck not be banned?