I've played Braum JG before, and you build him something like that. I was honestly suprised that he would clear as fast as he did, and his passive is amazing for pretty much everything. His W works as a gapcloser, since you can jump to an ally as they simutaniously engage, and his E gives a small MS boost. I don't know if its possible in season 7 tho.
You can try it, but do so in a custom game first. this is the kind of thing people will rage over if you do it and fail. AD braum tends to be a very squishy braum, and if you fail you will fail very VERY hard.