Slow and Haste are two VERY big mana eaters. Don't use slow if you are just trying to root rot. A DoT that only does 1 damage a tick is a total waste of time at your level.
You will be busy as hell ALL the time on a Shaman either grouping or soloing. I sort of hate mine lol. Too god damn much work.
[You must be logged in to view images. Log in or Register.] But with the Epic, and a Fungi, and a CoF, and Torpor, JBB it helps. See a trend here. Like a 400k trend. They cost a shit pot full of plat to play well.