Here are the shard production rates for levels 16-40 for Golem Overlord. The per-day column is the main entry and I am confident is mostly accurate unless I made a typo. The 8 and 12-hour columns are not exact. For example, at level 40 my 12-hour claim is ready every 11.06 hours. The 20.7 number for the 12-hour claim represents 1.873 (hourly production) * 11.06.
I hope you found this useful. If you see any mistakes please let me know.
If you aren't playing Golem Overlord and want to try it, please sign up using my referral link. https://go.splex.gg/?ref=unitmaster