GFG worth it for sham?

[fortior]

My (fungi-having) shaman's level 46 and I still melee a lot, though. It's just way more mana efficient to slow and tank right now, though that might change at 50 with new dots and harder hitting enemies. Still though, 26-46 isn't an insignificant amount of leveling, so why not just buy a good weapon now (GFG is great but PWC will do) and sell it off later to pay for JBB?