Best stacker for burning fat

male 45, started reta three weeks ago, 1mg week one, 2mg week two, 2mg week three and lost 20 pounds, gym 6 days a week and eating 2000 calories or less everyday, i was just wondering if anyone here can recommend me another peptide to stack with reta to burn even more fat, some say Tesamorelin, other say Mots-C, others say SLU-PP 332, what do you guys recommend or whats your experience mixing any of this? thank you