If it's a TRN solo cycle, estrogen(s) won't be a problem so running a SERM or AI during cycle shouldn't be needed. Run a small amount of Caber during cycle if progesterone sides start to show up then phase into Torm or Nolva for PCT.
Even though Torm or Nolva are mainly used to block estrogen receptors in breast tissue, they also play a very important role in stimulating the HPTA to get your endogenous test levels back up to par. Therefore, I would run either of them for PCT. I suppose Cab can be run with them, but honestly unless you are having a bad outbreak of gyno that doesn't respond to Torm/Nolv, I would not unless your libido is way in the pits.
One shouldn't go too crazy in manipulating their hormonal environment, lol.