I have used both a few times. M4OHN can be used alone, I don't think you would notice any effects from OHT alone though. OHT is a decent stacking agent, but has almost no anabolic properties. I notice less bloating, sides, & shutdown when I use it with 4ad.
Why not stack them? It would be a lean mass cycle with no water retention & the OHT should help with libido loss from M4OHN. Something like 20-30mg MOHN orally & a few hundred mg OHT in a dermal.