Well for 'One', make sure you have full star power to save you in Fast Solo A. 'Number of the Beast' shouldn't cause too much trouble, you can bomb the solo's and still make it through. 'Raining Blood' will cause you the most trouble, save your star power for Mosh 1, and only use it when your about to fail, because Mosh 1 lasts pretty long. After that, it's pretty easy to pass. Good luck with Lou, it's a huge jump from Medium to Hard. I beat Number of the Beast now, trying One, but I don't think you even get star power on raining blood until Mosh 1 =/. Well, I'll be stuck for a little... I also started the expert career, i'm on tier 5 atm.