This is completely at odds with your original assertion of a "Universal Black Belt" who has a solid, if basic, understanding of the various methods of [fill in the blank].
Let's isolate it to "punching" since that seems to be where you/most-responders want to go. You are suggesting weeding out some punching methods based on 2 criteria that are important to you, how much "damage" caused and how much "damage" sustained. However, those may not be the most important consideration in the system which spawned any given punching technique. For instance, it ignores speed of delivery, distance of delivery, targeting, and many other important factors which are often different based on the circumstances of the "fight" at hand. Those include many varying components such as what "stance" the opponent is in (what "guard" he is using), what footwork one is available or one is capable of (do you have a broken foot, is the ground smooth and flat with firm footing, is the ground uneven, is it icy or slick footing, etc.), what guard/stance you are using, etc. And even those are variable. For instance, when grappling is available, stances tend to be extended and distances tend to be pushed out. You end up with a stance more similar to modern MMA or historic London Prize Ring boxing stances. This dramatically affects what punches will be best suited to be delivered from that stance. There's a reason that the punches used in modern boxing, with hand-wraps and large/heavy gloves, are different from that of MMA, which are different again from that of historic bare-knuckle boxing. Those punching methods were developed and optimized for the environments which they evolved in.
Of course, you may want to try to restrict it to "street fighting" since that seems to interest you most. However, be aware that not everyone is in agreement with you that "street fighting" is the penultimate goal of any given martial art. And, again, of course, it still doesn't take into account differences in terrain, opponents, or personal situations. Is it extremely cold out and your opponent wearing heavy, cushy clothing? Is dueling with weapons common in that culture and the opponent may be wearing some form of stiff/hard body armor? Do you really want to try punching a modern "Warfighter" in the gut if he's wearing a full vest with trauma plates?
No, I'm sorry but your two pronged "best" punch criteria is laughably simplistic.