Meshcam is terrible at making efficient 2d or 2.5d tool paths. It can also drive you insane with quirks that are impossible to get around.
I switched to VCarve Pro and it produces MUCH more efficient tool paths.It's not a stretch to say it's 10x faster than Meshcam for most parts. VCP also offers much more control, a more intuitive user interface and great tutorials.
You might consider using a SO3 to make your parts since it has 15x more power than the Nomad. I use my SO3 20 to 1 over my Nomad for that reason and because I can cut much larger parts. I'm not sure it would give you the precision you need for these parts but my guess is that it would.