The argument that two sets of gear equal the highest damage doesn't convince me because creating high-level gear often costs more than weaker gear, even when considering two sets. Yet, M/W still deals 30% more damage in much weaker gear. Even before this enhancement, this combination was dealing massive damage, but what a skilled player can do with it now only reminds me of the first R/S changes when it was doing 90% of all damage in instances just for laughs. I don't play a mage, so I don't know what can be changed to make it more balanced with the other classes, but if it stays this way, in a month, we'll only have M/W in instances, nothing else.
Yes true, mage/warrior is stronger than other mages atm. But this class was nerfed many times. I remember they reduced static field's damage by 40% a year ago. If they want to reduce it's damage bonus. At least they should give 40% dmg bonus back to static field. Maybe Flame skill hits lesser to boss and static field hits more dmg against mobs. And remember not all mage classes are good atm. mage/druid and mage/warlock still need some changes. If DEVs are going to change this class. At least they should buff other non-popular mage classes