Hey Brohter, this is an interesting question and I am going to pass it on, to be answered more in depth on Naps new podcast "Advices" which will be released very soon (this week).
Ok, based on your experience and goals, you could try some osta if you like. Undestand though, this is not test and won't replace test. You could start here though, and you may make some minor progress. If you want to step it up, I would go with a long acting test for your first cycle. As little as 250mg, up to 500mg, would be a good weekly dose. Just make sure you use an AI like adex for estrogen control.
Be sure to follow it up with a solid PCT