Replacement
Wrong term. You're young according to your profile. Your test levels are probably OK. Personally I've had problems with testosterone injectables and patches. I always got the best results when I was young with Deca, Dianabol, and Anavor. Anadrol-50 made me big too, but it made my muscles so congested that they didn't seem to want to work properly. I tried Testoderm last year(a low dose patch). All I got was a bad case of Rosacea by the end of the 1 month cycle. It took a month of Metrogel to get rid of that. My test levels weren't even low when I began. I just thought I'd try it out. From what I've experienced I'd say that anabolics seemed to work best when I was young. As I aged they made me more susceptable to injury. Pushing too hard, running to fast, etc. But I wouldn't even want to recommend anything for you. Everyones different. I've always been my own guinea pig. You can read a lot of opinions, but in the end you have to come up with your own solution of how much to use and how long to cycle.
Besides that a lot of this stuff is not as readily available as it was 2 decades ago. The FDA put their foot down and made it 'schedule' stuff. My doc will give me all the test I want. Injects, patchs, gel, but none of the stuff like Deca that is more anabolic than androgenic. I figure it's a population control method. Test will probably drive you to a much earlier grave than Deca.
Oh by the way I'm a 'Paranoid Schizophrenic'. So don't give me any credibility.