From what I have read the common opinion for Pyro's Soulstone greater (Flametouched Soulstone) is not worth equipping over an epic lesser. What about the Elemental Soulstone? Has anyone tested this as an alternative? If so, how often does it proc? Could it be a DPS increase over an epic lesser?

Since it is a 92SP proc, if it procs often I can see this as being a decent investment.

Thanks all!