I remember someone on /r/chess actually evaluated every single starting position in Fischer Chess. This was the most balanced position: https://preview.redd.it/4o4kfv2kfcw91.png

Bishop, Rook, Knight, King, Knight, Rook, Queen, Bishop. Here's the post: https://www.reddit.com/r/chess/comments/yeregq/fischer_rando...

Maybe this should be used as the starting point? Traditional openings would usually give an advantage to White.