I don't see how Braum top wouldn't be viable. His Stand Behind Me ability can be cast on allies, minions and can be self-cast so he can still get the bonuses from it, his shield would work fine especially in 2v1 situations like ganks from mid or jungle, along with his q, which applies his passive and does damage based on a percentage of Braum's max hp as magic damage. Its all about how you play him. I plan to try him top a few times just to see how well it'll work. Honestly I think Braum top would be more viable than Braum jungle. He wouldn't have decent clear in jungle, his q is single target, and its his only damage ability next to his ult.