OP, try the Body, Hand, Feet and mix in the rest. Pound per Pound you'll come out ahead. Spell Speed is almost worthless on Smn. Don't make the that mistake.
Also, for me I won't be upgrading any Ironworks gear gear, why? Its going to worthless come the Expansion. If you find yourself wanting to try FCOB, go ahead and upgrade. If you dont try FCOB, I'd try getting my weapon upgraded.