I'm currently replaying Oracle of Ages in a race against my brother (who is playing OoS) so we could unlock the secrets for each over's games before we switch over. Just beat Crown Dungeon with a L2 Heart Ring (which I was lucky enough to get before entering Spirit's Grave) and 8 hearts. I would have died at a couple of points if it wasn't for that ring. My brother is currently in Dancing Dragon (Level 4) ATM.