Decided to spend the afternoon doing only normal dungeons and seeing how far I could get. Really pleased with the Odin I pulled during Godfest, as it allowed me to progress all the way from Oceanus Falls through the end of Tower to the Sky. That's 5 entire dungeons cleared, so 5 more magic stones! So now I'm sitting at the first level of Ocean of Heaven, and will probably try it in the morning and see how far into it I can get.
Nothing seems to be really getting that much harder, the bosses are just taking a lot longer, and you have to be ready to burn all your skills on the pre-bosses or even sometimes on trash monsters.
6 more dungeons to go until I'm at the end! I think Ocean of Heaven is where King Gold Dragons start showing up, so that will be nice.
BTW, has anyone EVER had a King Metal Dragon drop in the normal dungeons? I see them somewhat regularly, maybe encountered 10 in total now, and not a single one has ever dropped. Really frustrating.