Ideally a program with a home Mohs program in addition to a track record of Mohs matches (ideally multiple per year). Obv this depends on the residency class and who wants to do Mohs, but if a program has not had a Mohs match for like 3+ years that would be a red flag to me

Also a program with really strong procedural derm access is important. Usually these include places with a county hospital and VA, in addition to community hospitals + university hospitals for surg training