NYC-SU-MOW-SU-ATH is a valid routing. Interestingly, it exceeds the MPM that DL and SU list for NYC-ATH, according to EF. Would be interesting to see if that could be gotten with DL miles, since the routing is valid for the ST member operating the flights but over DL's MPM. (Although it's within 5%, so it might be in that wiggle room some have had success with.)