I don’t know if I’ll get pelted by rocks for saying this, but I use both WAD and mouse to move. It seems so natural to me. I started moving like this when I came upon the same problem as you, with SWG along with mouseover heals. Now when I pop the cd, my cursor is on the raid frames, and WAD takes care of the walking. I’m aware that’s 3 keys missing, but I’ve somehow managed to fit my spells all around those keys and be perfectly comfortable with them. You could try the same if it sounds appealing.