"As far as supplements though, you only need a multi-vitamin, fish oil, and a good whey protein. If you're eating correctly, those are the ones that will benefit you the most. Also, you should be consuming more than 200g of protein. Best of luck."
I agree with this sentiment on only truly needing those three supplements; creatine is a bonus and gets placed number four on my list.
Although unless your dieting is there a reason you need more than 1g/lb of bodyweight? I'll go up to 1.5/lb of lean body mass when I'm preparing for a contest. Otherwise, I believe you can make sufficient strength gains on 1g/lb. of bodyweight, and put most of your emphasis on getting in plenty of complex carbs -- I use around 2g/lb for bulking purposes.