This is the tuning E2-B2-E3-A3-E4-A4 (for a 53 cm scale length childrens guitar)
E2-B2-E3-A3-E4-A4
A bass 3-courses bouzouki E2-B2-E3 and higher by an interval of 4 , also 3-courses bouzouki A3-E4-A4 in total
OR
E2-B2-E3-A3-E4-A4 (for a 53 cm scale length childrens guitar)
or
E2-B2-E3-G3-D4-G4
Because the B2-E3-A3 is by consecutive intervals of 4 it allows for easy minor-major chord triads (on B2-E3-A3) in 1 or 2 frets only !
Also in the 2nd version because the D#2-F#3-A3 is 4-3m insterva; structure it allows for triad major minor diminished and augmented chords!
For the oud one tone lower is more appropriate
D2-A2-D3-G3-D4-G4
or
E2-B2-E3-G3-D4-G4
For a 12-string guitar we may have the version
E2-B2-E3-A3-E4-A4
A bass 3-courses bouzouki E2-B2-E3 and higher by an interval of 4 , also 3-courses bouzouki A3-E4-A4 in total
OR
E2-B2-E3-A3-E4-A4 (for a 53 cm scale length childrens guitar)
or
E2-B2-E3-G3-D4-G4
Because the B2-E3-A3 is by consecutive intervals of 4 it allows for easy minor-major chord triads (on B2-E3-A3) in 1 or 2 frets only !
Also in the 2nd version because the D#2-F#3-A3 is 4-3m insterva; structure it allows for triad major minor diminished and augmented chords!
THE LATER TUNING ALLOWS TO PLAY IN MELODIES THE PARTS OF THE MELODIC THEMES OF INTERVALS OF 2 OR 3 HORIZONTALLY WHILE SΗIFT THE MELODIC THEME BY INTERVALS OF 4, 5 OR 8 VERTICALLY (FOR MELODIC THEMES MUTATIONS). IN TOTAL I FIND THIS TUNING VERY CONVENIENT FOR MELODIES IMPROVISATION.
For the oud one tone lower is more appropriate
D2-A2-D3-G3-D4-G4
or
E2-B2-E3-G3-D4-G4
For a 12-string guitar we may have the version
(C2:C2)-(G2G2)-(C3:C3)-(D3:D3)-(A3:A3)-(D3:D3)
(5-4-3M-5-4)