I used: http://www.wowguideonline.com/wow-pr...ing-guide.html


The basic plan is to purchase as much as possible, over the course of 2-3 days.
And since I'll be doing 21 additional alchemists, if there are more then I need, there's no harm in buying extra when its available.
And to do the daily route (15 dailies, across one team) at least 3 times total over my 2-3 day cycle.

Which theoretically means, dailies pay for the alchemy leveling.
And a large portion of the herbs will be purchased and not farmed.
And it will be a two month process, give or take, to get all 22 Alchemists to 450.