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,

Todd Duffee vs. Alistair Overeem is still in works for Dynamite!! 2010 (Updated)

With a proposed bout between Alistair Overeem and Bobby Lashley now dead and buried, “The Reem” was left searching for an opponent. But just a few short hours ago, rumours surfaced of a potential fight with Former UFC Heavyweight Todd Duffee.
Reports were quick to surface that an agreement was possible, with both sides locked in tense negotiations earlier today, and it looks like the fight will go ahead with Duffee releasing the following message via his own Facebook:
“Have no plans on NYE? Dream

Fedor Emelianenko vs Antonio ”Big Foot” Silva likely to be pushed back to February 2011 (updated)

MMAWeelky.com has revealed that sources close to negotiations have said a heavyweight bout between Fedor Emelianenko and Antonio ”Big Foot” Silva is in the works for StrikeForce’s January event in 2011. It appears that M-1 Global have come to an agreement with StrikeForce and Fedor will return to the cage as early as January. 
Fedor is coming of his only loss of his career, that came earlier this May as Fabricio Werdum submitted the Russian Legend via triangle/armbar in the first round. Fedor

Thomson vs Kawajiri, and Sakuraba vs Zaromskis lined up for Dynamite!! 2010 (UPDATED)

Former StrikeForce lightweight Champion Josh ”The Punk” Thomson has reportedly been lined up to take on Japanese MMA fighter Tatsuya Kawajiri. Meanwhile Japanese MMA and Pride FC legend Kazushi Sakuraba is set to take on DREAM welterweight Champion Mariusz Zaromskis at Dynamite’s New Years Eve card.

Scott Coker says he’s not interested in Gerald Harris; Todd Duffee turned down an offer to fight Antonio Silva

Strikeforce CEO Scott Coker stated he will not be looking to add the exciled UFC Middleweight Gerald “Hurricane” Harris to the Strikeforce roster. Harris was cut from the UFC after a disappointing performance against Maiquel Falcao at UFC 123, despite having a 3-0 all-knockout record in the promotion prior to the bout. Here’s what Coker said on MMA Hour (quote via MMAMania.com) about the possibility of acquiring Harris’s services:”I talked to my guys about it, actually, they talked to me about it. I