Raloxifene is the best serm, as its good for joints. All Serms really arnt bone mineral promoting like raloxifene. Raloxifene seems difficult to find. I would think many companies would sell it because it tooks to be the perfect serm , and esp helpful to joints
Nolva is an antagonist to estrogen receptors in certain sites in the body. In certain parts (the brain mainly) it is an agonist, so it functions like a synthetic estrogen/estrogen blocker (depending on where the receptor it binds to is).
Controlling estrogen is the trickiest part of being on TRT or cycling. It takes a long time, many blood tests, stable hormonal levels (so you know how a certain level of an AI is affecting a certain hormonal level). This is hardly achieved on cycle except by people with many many years experience.
A little bit of nolvadex is OK for controlling estrogen in breast tissue (it will block it)...no need to take it everyday as the half-life is quite long. Its really not necessary for controlling estrogen (in breast tissue) if you dial in your AI. But like I said if this is a cycle and especially under your 10th cycle you probably won't get this dialed (hence guys using nolvadex).