Miesha Tate and a lot of the female mma fighters, Miesha Tate strikes me as she doesn't seem to be as physically strong as the other women (which I suspect a lot are on PED's probably steroids)
I would work my takedown defence and grappling for the year as my focus as I am already pretty good stood up. If she got me on the ground as I currently am she would ruin me with her superior grappling so that is why I would focus on that.
I am pretty sure I could knock her out with punches, kicks or knees in the clinch as I have a 15 kg weight advantage, a height advantage and as a male thai boxer probably way more power than anyone she's gone against.
Machida. I would just circle away from him for the first 14 minutes and 55 seconds of the fight, then lung in and throw one combination in the closing 5 seconds to seal the decision victory.