Nature's Bounty with Scholomance trinket

If you still have the oldschool OR new Scholo trinket [Barov Servant Caller], you can cast rejuv on the servants, and once they dissapear, you'll keep the 30% Nourish haste buff (Sometime's it doesen't dissapear after death, might be because you haven't left the instance).

You can then replace the trinket with whatever lvl appropriate trinket you have and still keep the buff until you die.

Hope it helps some of you in leveling, or even raiding