I want to start a bigger mining farm exploiting my cheap access to electricity. Which miner is most profitable at 0.01 usd/kwh? I mean, where you get most bang for the buck.
Whether it's $0.01/kWh, $0.05/kWh or something else, the general answer is miner with best energy efficiency. Since you ask on Bitcoin mining board, people usually would say Antminer S19 and it's variant (XP, Pro, etc.). But since you mention Scrypt ASIC miner (which i'm not familiar with), you might want to visit
https://www.asicminervalue.com/ as initial reference.