This song is a prayer to St. Elia that originates from from the mountainous region of Svaneti in north-western Georgia. When performed by Maspindzeli, the London Georgian Choir, it always has something very grounded and solid about it. I can imagine that a trio rendition would have a similar feel; see what you make of it - it is a very typically Georgian song harmonically, with the recurring 1-4-5 chords throughout and ending on a unison note.