I would start by getting you labs done and seeing where your natural tesl levels are. Especially for guys over 30-35, it's possible that levels are getting sub par. If you test out to have a good high-normal level of test, thats great, and when you come off and get retested, you'll know exactly what "normal" is for you, so you will know when you have recovered
as for cycle, I would start with a test only cycle. If you want to stay tight and dry, use a little more AI than if you are interested in just all out gains. Just be aware that some estrogen is going to be good for keeping your gains coming, I've found that guys in their 40's sometimes have a harder time recovering after cycle than the younger fellas. Becuase of this, I make a strong suggestion to use HCG at 250iu 2x wk through the cycle and stop 3 days before PCT
wk 1-12
test cyp around 3 to 500mg EW, split into 2 shots
wk 1-14
adex about .5mg 2x wk
HCG 250iu 2x wk
PCT starts 2 wks after last injection, nolvadex 40mg ED for 1 wk, then 20mg ED for 2 more wks.