Ergogenic aids that will not shut down natty production would be outside of steroids. Natrual test boosters such as phyto serms 347 would boost test levels without shutting you down.
My newest investement has been in powerchews using the pre workout, pre workout creatine and post workout formulas. I have been having issues with training for 2 to 3 hours at a clip and my motivation and energy levels were crashing. The chews seem to be helping. Creatine boost explosive short term power, I like that for grappling. The pre workout formula helps with natural energy levels and endurance.
You can check them out at powerchews.com
If you have any other questions just ask. I have ben training and using ergogenic aids for over 20 years.