any steroid use would be counter productive during your off phase. just because suspension or TNE is non estered, doesnt mean that it wont hang in your body. i was under the impression for some time that it would be in and out in a day. welp, i went in for labs at the end of a cycle and i was wrong. i had cycled off of everything and was using a low dose of TNE at the end of my cycle. 5 days before i went in for labs, i stopped the TNE and would you believe that my test still came back at 1500+, outside of the readable range.
your best bet is to stay away from all AAS while you're off. if you want to increase your pump and better maintain muscle, look towards peptides like igf1 lr3. this will not effect your HPTA recovery