I spent 1-2K G powerleveling Tailoring, last night. It gets... painful. At about 405.
The economies of scale in 'cloth --> bolts --> imbued bolts' fuck with me every time. I mean, I know I'm going to need a shitload of cloth. I went through it with runecloth, netherweave, etc. So I hit the AH, and buy what I feel is a TON of cloth, dozens and dozens of stacks, and yet its inevitably like one fifth of the amount that I need. :lol :lol I never learn my lesson.
But anyway, I did manage to hit 420. I can now make the 20-slot Frostweave bags... and the mats for it actually aren't too bad (90 cloth and 12 Infinite Dust is all).
I would have kept grinding the skill up, but the special cloths (Ebonweave, Spellweave, etc.) are orange recipes, now. So I'll spend those 4-day cooldowns to skillup instead, since I'll be using that cloth anyway. Free skillups, more or less.