I made my post under the context of the original post: Sigma set to 10 ply. You haven't put out any details of your setup, but even with a stronger computer I doubt it will perform exceptionally well in openings.
Also, I would be careful with assumptions like "much larger than anything I will ever have access to."
Engines don't play the openings in standard chess very well without their pre-programmed opening book. Maybe just use common sense instead ?