How do I solo as a shaman?

[Penish]

One of the few times I recommend using your BIG slows, your pet can tank just about anything with your current slow/level. Root is your main CC in which you can efficiently watch your pet scrap down these mobs one after the other with indefinite mana.

So in short pet, slow, root (only for cc), canni, regen & haste (for pet) should be the only spells cast in this simplistic solo setup.