well think of this
warrior with black dragons/emerald green dragons/vampire(bat form)/bone dragon and any other fast melee unit
now combine this with level 3 onslaught and the undead commander
makes the warrior always go first to cast a spell and make the units attack the mage before he can do anything
so the mage won't even be able to cast such spells ^^
his army will be decimated before hand ^^
warrior>paladin>mage ^^
ofcourse u can say a mage can have that too but there are simply not enough runes for the mage to gather it all(unless u make abuse of my infinite money trick

)
but all in all mage got lowest leadership
and an warrior stack doing +300% damage on a mage unit wel...
do the math
there have already posted critical above 10k damage (which is more than a single spell from a mage can do sometimes even more than 2 spells casted right after eachother
the only exception would be armageddon if i would do my math correctly
and furthermore this is HEAVILY BASED on the mage his intellect low intellect is bad mage
a mage needs to have at least 35 int> or higher otherwise he will be a wimp on impossible