Honestly bro, just go into Blast and Cruise. I have 3 really close friends of mine who in the past years decided to try steroids.
All 3 of them did bloodwork before and after.
All 3 of them were over 23 years old.
All 3 of them didnt go past 8 weeks of cycle.
All 3 of them did flawless PCT (yes with HCG, Clomid, Vitamin E, Tamoxifen or/and Anastrozole depending on the need along with good diet and foods to help recover hormone production) and used dosages below 600 mg test/wk along with some anavar or just pure test.
All 3 of them had bloodwork 1-2 months after PCT and their total test and free test reduced quite a bit, around 20-40% below what it was before cycle.
Aside from them i have heard many many people who did bloodwork and never recovered 100%.
To answer your question, everything is mostly genetics but when it comes to recovering from steroid usage, especially from a 24 week cycle then i dont think its very likely that you will fully recover (not even 50% IMO)
I dont even know why people cycle, you either do Blast and Cruise or you dont take steroids at all. Its hard to keep your gains even blasting and cruising, cycling is much worse.
Look at it this way bro, you need X amount of hormones to keep Y amount of body composition (a determined amount of muscle with a determined amount of fat etc). Once you stop your cycle you WILL lose ALL your gains that are above your natural genetic limit (which is very shitty for 99.9% of people). That is because once you stop, you will have like 1/5 of X of hormones in your body for example, so you cant keep Y body com********** You wont lose it right away but with time (few months) you will lose all gains.
What happens with blasting and cruising is that you basically increase your NATURAL genetic limit to your "NEW NATURAL" (CRUISE) limit, which is higher and totally depends on your cruising dosage, but you WILL lose all gains that are above of what that new limit can hold with time.
An analogy (dont know if its any good) to this is basically this: Imagine 1 horse working on his limit pulling a heavy cart, then you add 5 more horses, therefore you are able to add a lot more weight to the cart and they will keep pulling at a certain speed (also all 6 of them working on their limit). Then you start cutting loose horse after horse until theres only 1 left. For each horse you set free, the remaining ones will keep pulling the cart with the previous weight for some time but since they arent strong enough to pull that much weight with -1 horse, they will decrease in speed to 0, then you will need to remove extra weight to keep the horses from running and it goes on until theres only 1 horse left again and your weight on the cart is the same as in the start.
This analogy represents someone who is already on their natural limit and decide to cycle, the gains wont go away fast, but they will go away with time; For blasting and cruising the analogy remains the same, the difference is that in the end you keep an extra 1 or 2 horses, so your cart will be heavier but never as heavy as when you were blasting.
Keeping bodybuilding physique requires constant intake of hormones. If you did 24 wk cycle then you probably love steroids and working out, just go in blast and cruise you will be happier, trust me (speaking from personal experience, 2 years in BC already and its the best thing i did)
Just to finish, you dont have to do what i said, its just a suggestion. Some people are happy with cycling because they cycle few times per year and some people are also happy because they only like to look good for summer and they do 1 cycle per year to go to the beach, but if you really want to have a great physique (very much above average) then you should get on blast and cruise.
Good luck