SARMS do not aromatize into estrogen (assuming you have legitimate SARMS) and winstrol is a DHT derivative that does not aromatize into estrogen so no AI is needed with your cycle. If you feel that you naturally have high estrogen levels, then I would run a suicide AI instead of arimidex. The problem with arimidex is you will experience an estrogen rebound when you discontinue usage. Pick up the product liquidex AI from n2bm.com. That's what I would use.
RAD140 (testolone) was designed to replace TRT therapy in older men. If you do not want to include a testosterone base in your cycle, using the SARM RAD140 is going to be your best bet. The recommended dosage of RAD140 is 20-30mg/day.
I would run your cycle like this -
Weeks 1 - 8
Winstrol 50mg/day
RAD140 20-30mg/day
Liquidex AI from n2bm.com - 1/2 the recommended dosage/day
A good natural liver aid supplement like N2guard - 1 serving/day
After the cycle it's important to run a mini PCT to restore natural testosterone production.
4 weeks of the following:
clomid at 25mg/day
nolvadex at 20mg/day
A good natural liver aid supplement like N2guard - 1 serving/day
A good natural testosterone booster like HCGenerate ES - 1 serving/day