Gremlion

[bukimi]

I will post my question in this thread as it is similar.

I cannot beat Gremlion with fairly low losses.

My situation:
Impossible mage, losses acceptable. Lot's of cash, all islands (without Reha) cleared, tons of crystals.
So - in short - I can have any spell and any unit.
I have almost 60 intellect and 160 mana. I regenerate 13 mana/turn for first 10 turns.

I tried trolls with stone skin+divine armor, but they deal only ~1000 damage, so it would take like 130 turns to kill him :/ I played for about 30 turns and there were 4 gremlin towers and almost no more place for more enemy units to be summoned

What would you recommend? Any set of units and spells taken into consideration.
Thank you in advance for all your help.