Post by bwirum
You can do one of two things.
1. Go to the resto tree, get 5/5 furor, 5/5 naturalist and 1/1 omen of clarity and then work your way down the feral tree, respec at 50 and go for mangle right away, then go to the resto tree again.
2. Continue down the feral tree to level 50 when you get mangle, then pop over to the resto tree and get those 11 points. No respec.
Regardless of how you do it, this: http://www.wowhead.com/?talent=0ZxGMsfdogzio
should be your spec at 50, this: http://www.wowhead.com/?talent=0ZxGMsfdogzioVx0z
at 61. Some people prefer to put a point in nature's grasp in, but unless you're a pvp'ing type that want to stop for BG's every few levels I don't really see the point in a levelling build. You just need to pick your fights better without.
For primary professions I'd take up mining and skinning if I were you. At least only gathering professions untill you get to 70. Of the other professions leatherworking or engineering would most likely suit you best, at least if you are going to stay feral. Or enchanting, but that doesn't need any particular gathering profession. If you're destined to go resto or boomkin at 70, well then you might perhaps consider herbalism for now and alchemy when you're 70.