Sorta back in the swing of things

[Fat Tire]

I don't think you can beat Engineering when it comes to PvP.

You may also want to hold out for more profession information from WoD before dumping a ton of money into something that may change. /shrug

^This. Professions will worthless for combat.

http://us.battle.net/wow/en/blog/13423478/#professions

Professions

Some of our goals with Professions in Warlords of Draenor are to make them more of a personal choice, and less of a mandatory “min/max” selection. To that end, we're removing the direct combat benefits of Professions.