Congrats on winning your last fight. You havent mentioned what your diet is like. Or what type of weights training you are doing in addition to your fight training to help yourself get stronger. These two things are probably way more important than what AS you should use. If you dont have your diet and weight training routine in check you are not going to gain and retain strength. I trained for years Kickboxing and I ran with a few types of AS but I made my best strength gains when I realised i needed a proper diet and weight training. By the way I ran Test Prop and Winny in the lead up to my fights I also ran Anvavar a few times. I am not saying these are the best compounds but just what I used and had some success with. My most memorable fight was when I won and I didnt use anything in the lead up. Just my big heart. Good luck with your next fight champ.