At least until yesterday it wasn't that easy to get through PotD solo. I think I spent (only) somewhat between 15 and 20 hours so far. My best progress until then was floor 30 where I failed to defeat the boss. When you found a silver chest and thought you finally get a bit stronger, most of the time you got the message that the Aetherpool didn't increase. And because you had to defeat the boss in order to save the Aetherpool gained through that 10 floors I had to start again from floor 1 in hope the Aetherpool will increase in floors 11 to 20.

I will probably try it again with the recent changes in the near future.