Essentially you could stay around the water in Sholazar and find herbs continously but sometimes they do become a little scarce, this is why I head up along the west side and come back to the water. Here you will find, Adder's Tongue, Goldclover, tiger's lily and on gathering any of those you have a chance to get Deadnettle's.
In Storm peaks the area that I love to hit is just slightly west of Dun Niffelem and alot to the east and north of there. Here you come across Lichbloom and Icethron.
Both places your gather will give you a chance to get a Frost lotus, which you have a 0.04% chance in Sholazar and 0.05% chance to get in Storm Peaks.
I don't have any hard data on how many stacks I get per hour yet, but will when the gf is out I will hop on my druid the do an hours run in each area, suffice to say my guild gets a little sick of my spamming Gatherer info to them when I am either zones.
I'll also break it down to how many Frost Lotus's I end up also will get a break down on what amount i could possibly make in the ah, but then again those would be my ah pricing which might be different then yours.
Till then, Later.