I think it should've went On The Floor >> I'm Into You >> Hypnotico >> Run The World [Ft. Rick Ross] >>> What Is Love?
I'll tell you why. "On The Floor" obviously did amazing no need to elaborate. "I'm Into You" also did well as it peaked @#41, and still went Gold. The problem was that she did zero promo for the track, so imagine if she did. It would have atleast reached the Top 15-20. Thereafter, she should had released "Hypnotico" it was the 2nd club banger after "On The Floor" and would have snatched wigs! Could you imagine a Gaga feature? Then she could've released "Run The World" with a Rick Ross feature to Urban stations, and lastly release "What Is Love?" to close the album as it's final single.
But of course her and team did not know how to make great or wise decisions.