Hey bro, ok, as for dosing, 600mg is more than I would suggest for a first time cycle. I usually suggest 250-500mg EW with 30mg dbol. At your stage, I wouldn't go past 600mg. You should be able to grow off that for a few cycles. The more you take, the more you'll need to take to keep getting a good response and the more side effects, such as hair loss, you will experience. As for cycle length, I usually suggest 10-12 wks for a new user, so you were right on the money. 8 wks at the least for a Test Cyp or Test E cycle.
As for cutting drugs, none of them are really "good" for your hairline. Tren can be bad for those prone to hair loss. Most of the other cutting drugs are DHT based, and as you probably know, DHT is what will ruin your hair. A major key for you, will be in the dosing. If you are prone to hair loss, it is going to happen with gear, no question. But using less gear will reduce the loss you experience. Using a DHT blocker will help block DHT from test but it won't be as effective with other compounds. I would suggest no more than 5-600mg test. You can continue to use long acting test and take an AI or you can use prop, which may not require as much AI. From there, I may add in a mild drug that will work to harden your look up some. If you want to diet down, you can add in some clen, which won't have the same effect on your hair that Steroids will. I would continue to use adex in this next cycle, as reducing estrogen will help with fat loss. It's a double edged sword though. Test is going to want to break down into either estrogen or DHT. If you block conversion to estrogen, you may experience more DHT, thus more hair loss.
wk 1-12
Test 5-600mg
adex .5mg EOD
clen 40mcg for 2 wks, add 20mcg E2W, going no higher than 120mcg
5-12
Anavar 50mg ED
You will expereince good strength from this cycle and with the right diet, you can get pretty hard/lean. Anavar is a great compound without many sides. Much easier on the hairline than winstrol