Hi this is my first post to try and help this community and sorry if its a repost.
First you need a flying mount and 375 herbalism!
This is easy done with a Warlock, Mage, and a Good geared warrior
Note: balance druids cant really do this becuase they are immune to nature damage
Ok there are elite Trees that path around skettis(located in terrokar forest) Talonsworn Forest-Rager - NPCs - World of Warcraft They roughly have 24k health so its not really hard! they give 2-5 mote of life everytime you herb them and also 2-8 of two random outland herbs!(i have gotten 16 mana thistle from one kill)
these mobs also give 30 sha'tari skygaurd rep.
note: as mages and and warlocks you can just cc them with fear and frost nova
and again sorry if this is a repost