When to stop melee (Shaman)

[Brutal_X]

On my level 40 shaman I've currently got a GFG (Granite Face Grinder) and the Velketor haste gloves. The rest of my gear costs below 1k a piece but overall there are some pretty decent pieces in there.

My question is: At what level does melee become less effective and it's better to root rot? I've heard answers ranging from use melee until I get my epic to I should've been root rotting since 34. I'm looking for the most effective way to level so if I have to sell my GFG for an SBS and a good mainhand I'm willing to do that.

Thanks P99 community!