I have looped The Enigma of the Black Martian Jing today for 8 hours.
Here is my subjective feeling for this field with regards to the sexual energy accumulation speed when using this:
Looping The Enigma of the Black Martian Jing: SEAS +500%
But also keep in mind that all of these field all do slightly different stuff and it is not all about just the fast recovering of sexual energy only, or in other words, every field have their own specific function and best scenario to be used for. Sexual energy accumulation speed shouldn’t be one’s only metric when choosing a field.