This is an interesting post. I've got some feedback and a couple of questions for you.
Assuming you inject 2x per week at the doses you listed, using 10 day half life for enanthate, your blood levels look like this. Yellow line is test, blue is tren, black is both added together.
View attachment 566977
I showed on there taking your last shot mid week 8, and starting PCT week 11. The red line is roughly what your natural test level looks like, assuming your body is making about 10 mg/day. Blood levels above that line you are suppressed, below it your HPTA should start to signal to make test again.
You drop below that line week 12-1/2. So probably the nolva you took week 11 up to 12-1/2 won't do anything for you. People use clomid along with the nolva, and use a higher dose of clomid that first week or two to combat being still supraphysiological.
So, will your PCT work with only nolva and low 20mg/day dose? Don't know. You would increase your odds by adding clomid at 100/50/50/50/50, and using nolva 40/40/40/20/20.
And now questions - are you taking any AI along with your AAS? If you let estrogen run away when you've got tren in your system it will boost your prolactin, and you might find your nipples leaking and your dick floppy. Can also cause gyno.
Regarding the SARMS? I've go no idea. Seems like the best way to keep gains would be to run a long ester cycle longer than 8 weeks (something like 12), use an AI during the cycle, and increase the odds of your PCT working by using both clomid and nolva. You can also boost the odds in your favor by taking HCG during the cycle and in the gap before PCT.