Let me correct that, Caulum is very easy to complete, you need to buy the keys from the shop 2K each (just 5 floors).. but getting the chest to level up is really hard from my experience this far.

Okok, now I get it: not having to crafts 21+ keys for Caelum is, at least, a good news though 😅

can you send me the json that would help me out a lot

Done! Sent you through discord, as it was to long to copy-paste here as a comment.