Solo Shaman Gear / method

[Tr4c3r]

I currently have a lvl 20 shaman and am using a GFG/SCHW.

I disease, poison, slow, frenzy and melee things to death.

I am not sure if this is the most efficient way to level though as I get hit pretty hard and I miss a lot. Should I sell me GFG and haste item for mana items and just root/rot? Not really sure what I should be doing to lvl the fastest solo.