Looks like I've finally hit a wall in the normal dungeons with my ADK team. Vesta Cave. Looks like it's the first dungeon of the final tier of normal dungeons according to the wiki. It's a Red/Green dungeon, and the first floor boss is a Phoenix Knight with 11,396 ATK, 643,293 HP, and 11,000 defense. I could survive a single hit, but I couldn't heal fast enough between attacks. Looks like I'll have to resort to team planning instead of the brute force that's gotten me this far. What sucks, is that I actually ran into a King Gold Dragon and got the egg drop, but I wasn't about to spend a stone on a 13 stamina dungeon for it. And actually it probably would've taken me a couple stones to beat the boss.