Logic behind Mixed Martial Arts rankings

Rankings. They’re addictive and endlessly debatable, or are they? One of the great features of Low Kick is the option to submit your rankings for the respective weight classes and of course, the revered and glorified “pound for pound” list. 
The question I have been asking myself for weeks now is what gives a fighter the right to be in the top 10? Should it be based on skill alone, the physical abilities that fighter appears to exhibit against his opponents? if so then the likes of Alistair Overeem,

King Mo vs Gegard Mousasi official for April 17th

It is official now, the undefeated Muhammad “King Mo” Lawal will face Gegard “Dreamcatcher” Mousasi on April 17 for the Light heavyweight championship.
King Mo is currently undefeated and has defeated seasoned veterans like Wiuff, Kerr and Whitehead, and now he will try to move up to harder competition when he face Mousasi for the title. The war of words between the two fighters has already begun, as King Mo has called Mousasi “Kermit the Frog” and Mousasi has retaliated by saying “Mo will pay for his