Which Format is Best for Going Pro? (Online and B&M)

[12AX7]

Hi Everyone,
I've been reading the "Books and Publications" section as of late and am debating what to study next. As a result I find myself thinking about where to focus.

So, since my goal is to get good enough to go pro in as short a time period as possible, what format does everyone think is best to do this with. Both in Online and B&M venues?

Is it Cash Ring Games? 6-Max Cash Ring? SNGs? Multitable Tournaments? Limit, No Limit? Etc.?

What's the fastest way to get the most profitable?

I find I'm not really sure the answer to this.

What does everyone else say?

Any current pro's have an opinion?

Also, if any 2+2 authors are reading, what's your take?