OK, I'm probably not going to phrase this very intelligently because even though I'm a musical person (western music, that it is), I'm really not very familiar with the classical byzantine chant terminology to phrase what I'm asking correctly, so please here me out.
For all you chanters on OC.net who use (neo)Byzantine chant, we chant our Great Litany at Orthros in plagal fourth tone with its final on "Ni." Then we proceed into "God is the Lord" which, of course, varies from in tone from week to week or if there is a feast. Rather than simply chant "Amen" on Ni and then have to repitch for "God is the Lord" in whatever tone it may be, we chant the A on Ni and then, if it is first tone, we chant -men on Pa which moves in nicely. For tones 3, Varys and hiermologic plagal four, we chant A on Ni and then move up a fourth to Ga for -men. Again, we do this so we don't have to repitch; I'd actually like to do this for all litanies that move into chants with different tones like after the Little Litany at Vespers proceeding into O Lord, I have cried. The biggest issues is how to do this for the litany in plagal tone four moving into tones 2, 4 and plagal 2 hiermologic. If anyone has a good way to do it without using too many notes, I'd love to hear it.
Again, my apologies if my explanation of what I am asking is too inexact.