I think instead of the question being “what are People’s opinion on the most energy-providing audios and most energy-draining ones” a better question would be “what are peoples opinion on the most energy developing fields”
If you want to outsource energy, i suggest buying the tower of power
Other than that, i highly suggest developing your energy body, so you can handle more fields at once :)
Do note, nothing is over night… Developing the energetic threshold happens over a period of time… How long is this period of time? Well, it varies on many things…