Shammy - GFG or Icewurm Fang + Sarnak Shield?

[Triiz]

Yeah put the 7-8k a Icewurm Fang costs towards an Iksar BP if you don't have any worn regen.

Around 45 is when shaman melee becomes a lot less efficient, but backing against a wall/slow/face tank/spamming JBB will get you from 45-50 super fast. The only real mana you're using is for slows/regen/hasting pet so you can chain pull and if you're spamming JBB back to back you'll barely be getting any melee swings in so an icewurm fang wouldn't make much difference.

Since you already have one, maybe just switch the Howling Harpoon to your primary and find a cheaper range spear. The occasional stun proc would probably be more beneficial than the negligible DPS your melee would be doing between JBB clicks.