I've cleared castle of satan, have yet to try technical dungeons since it's 1/2 stamina at tower of giants I'm just grinding for levels.
My aim is to be able to clear the master difficulty special dungeons. I can clear the expert difficulty of the legendary evil dragon and sky dragon of flame now but it doesn't seem worth it to keep trying the expert difficulty.
I'm short of 2 light keepers to evolve the amaterasu. They didn't appear for me at all the last time I tried =\