You have to fight a guy who is bigger and stronger than you. He is 5 inches taller and out weighs you by 75 pounds. You have to fight him and dont have a choice. If you could choose only 1 fighting art to be good at which one would it be to defeat this opponent? I would go with Judo reason being is they could take the guy down and have submissions as well. Bjj would be good but stand up is kind of poor and you don't want a guy 75ounds heavier on top of you. Wrestling is great for control but not submissions. Boxing may that are good but if the guy gets on top they may be done. Karate and krav maga not sure about! Which would you choose?