Generally you can expect a lot of thirds and occasionally some other intervals. The harmony section in UtWGC Silence in the Snow is thirds in C minor for 6 measures, then a mix of thirds, fourths, & fifths for the next two measures. Thirds isn't too much work to set up: choose dual harmony type in the pitch block, key = C, scale = Aeolian Minor, voice 1 harmony = 3, turn voice 2 level = zero.
The last bit played as one part on the high b & e strings (tuned down 1/2 step) would be 14-14, 12-12, 9-9, 5-7, 9-9, 7-7, 5-4, 4-2, 2-4. You could manually switch between 3rds/4ths/5ths but custom shifter type often makes this sort of thing easier because you can shift each note to any other note. In this case you'd need two custom scales because E and C# have a different harmony note at the last 3 note pairs vs. when they first appeared.