Kakashi is screwed after he uses his Mangekyo Sharingan a few times. Since all the Pains have linked vision, you'd also want to give as little away about your ability as possible.
I was actually surprised at how many times he used Raikiri straight up before anything else. I guess it's the first time we've seen him fight someone so dangerous that you need to assassinate him immediately.
Furthering the conversations before about clones taking a hit, Kakashi's ones sure take them rather well. The first kick that went through him was both confusing and cool-looking. Strange that he'd opt for a Lightning Clone though. I was under the impression that Shadow Clones were the only clones to form a real body, making them indistinguishable from the real one. Pain should have taken the hint too when his first kick failed.
I have my own issues with this final(?) Pain's power being Magnetic Force. It doesn't fit into anything currently existing what so ever, and looks like something a filler writer (or movie writer) would come up with.