So, let me get this straight. You claim that you're following spell rotations correctly, but also that you're bad?
Mages are fine, with or without the legendary. You don't need us to confirm that; you can go check WoL. What you can't do here is post a whiny question that's written like a lazy blog post, with poor capitalization, an armory link that's already in your profile, and no logs of any sort so people could actually comment usefully.
Please review our forum rules before posting again; you agreed to them when you signed up, and you have broken a number of them.
can a mage still be competitive with other classes without the legendary staff? I didn't play much during Firelands, and now that nobody goes through firelands, I don't think I'll be getting the staff before MOP.