Hi Warcraft logs teams,
In wow classic, the description of 6T3 of the mage is quote as" Your damage spells have a chance to cause your target to take up to 200 increased damage from subsequent spells".
However, it is a buff on the target and can be consumed by other casters and very unlikely to benefit the mage who gear 6T3 himself/herself. It is a very unfair situation and is it possible for WCL to attribute that dmg to the mage who actually gear 6T3 and cause the buff, as we do for Ignite.
Best regards,
Breezer