engineering is total crap, unless you plan on making 5 mechanohogs i think you can skip it without missing a beat. Skipping JC is crazy since its the best self-buff profession in the game right now and the daily make nice extra gold.

Blacksmithing is also not too hard to skip, its a bit expensive to level and you will use it maybe a dozen times at the top end to make the epic BOE items and belts, after that you will rarely touch it. It is nice prof for tank though for extra two sockets.