That being said, I have tried uberman before, and it was devastating in the short term: I felt very burnt out and constantly fatigued. However it's possible that I just wasn't doing it correctly.

This is the intended result, for some values of "short term." In theory, after approximately a week of only napping, you begin to get REM sleep during naps and then recover. This did not happen to me in 7 days, and I had only arranged to be continuously watched for 7 days, and so I promptly crashed day 8 or 9.