dark corsair hard mode

there was no help or guide section so i am putting that here..

I suppose some ppl like me might have trouble with the dark corsair boss in hard and challenge mode

For now I failed 3 times and only had the idea to gather info to devise a strategy the last time I failed.

so I gathered that the most powerful spell is air and hit all your curios with very hard damage, I also gathered that it takes 30 mana which means it can only be done once by dark corsair that only have 50 mana..

Let's try again..
Alright failed again..
It also appear to have a mana drain that is way better than Vastokian's Brain drain as it sucks 6 mana from all your curios and replain the dark corsair that can thus do more of its air AOE skill..
So my guess is that a curio alone would have more chance but this curio must be able to clean debuff as the massive damages from the air AOE takes one turn to be dealt 
Or..
if your lead curio can clean all team mate debuff then it can be providential as the dark corsair will just be wasting turns trying to do damage a lot more since it will have more mana to perform said AOE skill..

I would advise to get a look at the cleansing possibility you have in your collection personnaly the first and only coming to my mind is asclep so far..

Reply to add more thoughts about this boss..