I shoot split finger also, and barely touch the string with my ring finger these days. I draw with that fingertip touching the string, applying next to no pressure, and gradually let it slip to barely touch the side of the string at full draw, with no pressure at all on it. My middle finger has a deep hook on the string, and I guess around 75 or 80% of the hold, the top finger has the rest. Keeping the ring finger touching the string seems to help, but any pressure at all with it throws the shot .
Just what seems to be working with me, and my bow.