While his may sound a tad bit nitpicky, but those chracters have quite vauge descriptions. Neither can i tell how strong exactly they are, how fast and dexterous or robust, nor can i pinpoint the durability of their equipment. And all that would be quite important to actualy gauge the damage dealt and recived by those characters, as well as create a certain margin to what they are able to do, and what they arent. 

A good example would the inability of a charcter capable of reaction and movement speed on par with that of a human to defend against a character who causaly moves at around half the speed of sound and clearly percives objects moving at speeds up to mach 3. Here we have solid numbers and solid combat, where any given charcter can have certain advatages over another; beat, or completely lose to them in all parameters.