beating the game on superhuman was a lot easier than on Hard... maybe (of course that is...) because I already was a lot better on the game.
I even was expecting to be harder than that.... superhuman in R2 is like a normal game on Bioshock.
the secret to kill the titans is called Bellock IMHO. a good shot with that and they´ll die really fast. other than that... magnum was my best friend in superhuman when I didn´t have the fareye... both kills enemies with a single shot.