Becoming superhuman (overhuman) is all about achieving synergy. A lot of people can have incredible sprinting speed. A whole bunch of people can memorize licence plates of cars at a glance, without even trying. A good number of people can speak 8 languages fluently. There are a lot of incredible fighters out there, that are able to engage several “normal” humans at a time and win easily. Almost everybody reads books about body language. Great tacticians aren’t rare.
And such people are truly incredible, but in order to achieve overhumanity, synergy is what is most neccessary. To be able to put it all into one, to be able to speak to a native speaker without him realising you’re not from around that place while you pose as somebody you aren’t, the whole time monitoring his body language and, prior to the conversation, “registering” the person via minitiae, analyzing details in seconds to get a picture of who this person is. And memorizing the licence plates of his car. While being able to defeat him with one stroke.
That is synergy, and that is overhumanity.