If being off axis sounds good then adjusting toe in is your first priority. I am not familiar with your speakers but some sound better pointed directly at you, some straight ahead, and most somewhere in between.
Try them at both extremes first (straight ahead then straight at you) just to get an idea and then play with them until you find the sweet spot.
Adjusting the tilt of the speakers will also have an impact. If you can't find a toe in that gives you good imaging and best tonal balance, adjust toe in for best imaging and then play with the tilt.
I think that damping the first refelection points is a bogus issue and won't affect what you describe.
Try them at both extremes first (straight ahead then straight at you) just to get an idea and then play with them until you find the sweet spot.
Adjusting the tilt of the speakers will also have an impact. If you can't find a toe in that gives you good imaging and best tonal balance, adjust toe in for best imaging and then play with the tilt.
I think that damping the first refelection points is a bogus issue and won't affect what you describe.