Essentially this is tuned to a diminished chord, and is naturally suited to playing chords, melodies and basslines that are 'symmetrical', meaning that melodic shapes can be shifted without changing fingering (like bar chords on guitar).
This is a groove which eventually became a song called 'Sin Eater' (which is still languishing with no words). Here's the latest mix.
The chiming harmonics form an A minor 6 chord--not so far removed from diminished.
Alternate Tunings Tips
Tip 1:
When playing in a simple detuning (e.g. AGDCF) transpose up a major second. For example, if the song is in D, Play it as if it was in E. This allows you to ntegrate the full lower range, rather than playing a 4-string with an added lower string. Essentially, you are playing a transposing instrument, like a french horn, which sounds a 5th lower than written.
Other examples:
Detune a guitar a major third to C-F-Bb-Eb-G-C (Play everything up a major third, e.g. if the song is in D, play like it's in F#. (This is also a good exercise for learning how to play in unfamiliar keys!)
