6' tall and wanna be 200? You can do that naturally in my opinion. I work for Uncle Sam and am 5'9" and made it to 225 naturally, within body fat standards.
You're posting in the Supplement forum, yet mention anabolics, but your main goal refers to nutrition and training
If you're going into the Marine Corps, I'd hate to blow hundreds of bucks on PH's and ancillaries, only to run your ass off in basic