I'll tell you the worst game plan. It was Ken Shamrock vs Royce Gracie II where Ken decided to stay in Royce's guard for a full 30 minutes to end the fight in a draw.
Oh and James Toney wearing ankle warmers to enable Randy to get a better grip when he shot in for an ankle pick. Sadly I saw the odds was too good so I dropped a hundred on Toney; 5:1 OR 3:1. Friend and I split it. SOB!
Best game plan which I don't necessarily agree with was Condit vs Diaz. It sucked...but he won against a very tough opponent and got a title shot. Maybe that should be categorized as the "most effective" game plan rather than being the best or most exciting.
So the absolute best at the moment would have to be Ronda Rousey. Nine arm bars in a row. Same game, same submission, same attack. Hasn't been stopped yet.
Marcus Aurelius: Tell me again, Maximus, why are we here?
Maximus: For the glory of the Empire, sire.
Baked, not fried... the healthy choice.