how do you dealing with black dragons as a mage ?

[kemydes]

those black dragons are a real pain to deal with as a mage. I have found (i am sure i am not the only one^^) a good way to deal them massive damage with a combo with the green dragons to put them in a trap. But against great stack it is not enough to get rid of these and after the trap its a real nightmare, so if someone as a good strategy ... post it please.