"Will MoI make these rings with precision"

Yes! But, you will be modeling all that stuff, and placing it on the ring. But that in and if itself is "precision"....

You mentioned and have probably seen "embossing images" for more complex shapes and designs... this is less precise, but can get extraordinary detail and organics. MoI does NOT do this....

Your best "embossing" stuff will come in CAM programs.

If you are "manufacturing" your items, actually modeling things is a good way to go.