Yeah, Feruchemical gold can heal shardblade wounds.
Assuming that you an active line of healing is good enough to keep you going even if your spine gets severed (which I would guess is likely, given the (physically) traumatic stuff Miles goes through), then TLR should be able to heal no matter what. There is the long-term soul-scarring issue, but eh.
More concerningly TLR really isn't a good candidate for a Versus match, since at the top of his game he simply wins. Functionally infinite Feruchemical steel alone is probably enough to one-shot essentially anyone without some special immunity, not to mention literally everything else TLR can do.