Used together, for 2~4 shoeings, this would be my suggestion. The Dormosidan to keep him calm, and the glue-ons to get him to understand his foot isn't going to hurt every time. Once the foot has healed, back off the sedation, and once he'll stand for a set of glue-ons without sedation, reintroduce him to the idea of nailing. While glue-ons are expensive, they cost less than the vet visit in my experience.
Also, if this has been going on for a while, have we done recent radiographs or an MRI to be sure the infection hasn't gotten into the bone? That can be a big cause of ongoing pain issues.