Gawt dayum there's a lot of **** in this thread.....
OP - To very basically answer your actual question.... Yes you can stack those 2 together. You will see more from the 1-andro than the ostarine. I've run osta once and I wasn't a fan of it. Like someone else said, it just seemed weak. I got more from a 1/4-andro run IMO. Stress on the "My opinion" part.
No one can answer how bad it'll shut you down. Realistically the close anyone can get is "Yes, it WILL shut you down to some degree" All the other stuff depends on what your levels are currently at, age, diet, even outside stress factors, etc...Only way you'll know how much is pre-run bloods and post bloods although I'm sure you can find some decent logs of both of those compounds to see someone elses shutdown.
no im not going to stack a serm and a sarm, seems like out of all this i rather stack a 1 andro, 4 andro and 19 nor andro then a very little research pharmaceutical drug named osta...
Any 19-nor is going to shut you down harder than 1, 4, epi, osta, etc....This is guaranteed. This is why all the heavy anabolics for crazy gains are generally 19-nor. If the scale of suppression is 1-10, I'd say Osta is 1, and a 19-Nor is a 10.
If you were to run a cycle of only 4 weeks....which won't yield much for the andros, you can probably get away without the use of a SERM. That probably won't be a very popular opinion, and while yes a SERM will help immensely, for such a short cycle of something like 1/4 andros, you'd 'probably' be okay with OTC like Sup3r PCT.
Start getting up into 8 weeks and I'd definitely want to have it on hand. They are easy enough to find.
The other thing about the stack you are looking at, is that it will very well cause lethargy due to the nature of what you've chosen. 1-Andro is a DHT derivative.
4-andro is a test derivative which is why 1 and 4 are frequently paired together as your natural test will shut down. Since 1-andro converts to 1-testosterone which is purely anabolic, it does not convert to DHT or aromatize into estrogen. You do need SOME levels of DHT for your sexy drive, energy, aggression etc, and a little estrogen for lubricated joints as well as "Wet gains' which is what 4-andro brings. The idea is to keep all these in balance, not completely eliminate one.