His reaction speed is said to be 15 times faster than a human's, so it should take between 0.007 and 0.013 seconds for a shield to go up. Starting distance would be 500 m. How often does she blitz from the get go?
Cheetah's all about getting the drop on an opponent, whenever possible (CIS/plot-purposes aside), and especially when her target is powerful and/or has abilities very different from her own, so her speed-blitzing at the get-go is not at all strange or unusual for her, as a character.
That said, I agree with Shiv: just flip a coin. Their MO's and circumstantial factors are just too opposed to give a truly viable answer (kind of like the one thread with Superman vs. Doctor Who -- each can trump the other so easily, but circumstantially, that it negates KMC as a setting...)
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By default? I thought CIS was *off* by default, unless clarified otherwise. With shields on, he'll likely win; with shields down (even for a fraction of a second), she wins. Like I/Shiv said: flip a coin. This really isn't that interesting a battle, as each has a trump card over the other...
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Mags start with shields because he is one of those characters that usually have shields already up during a fight. Anyway I don't think Cheetah can exhaust Mags to a level where cheetah can actually breach his shields.
Each of their definitive CIS modes (Mag's running his mouth in "mwah-ha-ha" fashion, or Cheetah "playing with her food") is pretty neutral in this case, as neither would readily apply. As stated, with shields, Mag wins; given a fraction of a second for a "surprise" attack, Cheetah wins. Not an interesting fight...
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