I am thinking about changing mains come Legion and I am leveling several classes that I didn't have at 100 yet. But I want to be able to use the boost so I can get the profession bonus. Can I still use it on a character that is at the level it would be boosted to and get the prof boost or will it not let me?
I ask this under the assumption Legion will come with a level 100 boost which I am planning to use on an already 100 character, but if I have to I guess I will level to 60 again just so I can get the prof boost.