Tbol will get you the most gains. Gains really dpend on how much food you eat but with everything similiar T-bol. For fat-loss is the AAS that binds to the AR receptor in the fat cell the hardest. Primo, Anavar, and Winny are all DHT dert. which bind very hard to the AR receptor, thus will promote more fatloss. Again fat-loss depends on your calorie cut but I notice with Anavar you can go real low on kals and retain your muscle mass.