When you put it that way, 45k does seem too high. As for how both Goku and Reacoom did, that could come down to a difference in fighting style. Reacoom left himself open throughout his battle with Vegeta, whereas Goku was focused on utilizing his speed and "unimaginable" power behind his limited attacks. Vegeta said Reacoom "treated him like a baby", so we know Reacoom was playing around.
I just never really thought of Nail as being stronger than the Ginyu members. But if I were to put Reacoom at 40k instead, I'm still not sure Nail would win.