Not really an anabolics section question, but you can still get some decent advice here. There are a pleathora of options for a natural t boosting stack, i can name off a few of my favorites. My issue with these stacks is the amount of money spent for the change in body composition. You can spend 100 bucks on a stack to maybe get a change... is it actually worth it? That's for you to decide.
Driven Sports: Activate Xtreme, Triazole
SNS: DAA, Reduce XT, Inhibit-P (soon to be released prolactin control),
Biotivia Bioforge (any version: Bioforge/Bioforge ProMax/ Bioforge v3)
Those are basically the only ones i feel are of any worth. Out of those options you can make some nice stacks, or just run 1 product.