Hey, I can see you have tagged me here asking for some advice. My advice would be getting gear with flat damage bonuses on it, such as Justicar set. Double Blazeheart would also be preferrable. And you should most definitely go for green Demo belt to convert that flat Aether into Fire. Try copying my melee shieldbreaker and adjusting it for sorc.
But mainly, Sorcs play MUCH better as casters. Playing them as anything else is a bit like shooting yourself in a foot. And you have four pieces of a very powerful caster set already.