I think it would be a waste as well. Remember that Nolvadex only prevents estrogen from binding to the receptor site....it doesn't prevent the formation of estrogen. Nolvadex will, however, stimulate LH and FSH. This increase in gonadotropins (LH & FSH) will result in an increase in testosterone production by your testes. Perhaps that is why some say that Nolvadex hardens them up....because it increases the test to estrogen ratio slightly; not too much of an increase though, since that would only result in more aromatization of the increased test, resulting in more estrogen.
If I was going to take anything off cycle, it would be Arimidex, Proviron, or zinc. Zinc would be your best bet IMO. Try 50mg per day. Arimidex 1mg twice per week will keep estrogen levels low for sure. Proviron at 50mg/day would be a great way to go as well, but, remenber that Proviron is an androgen....a weak one but still an androgen.