How to deal with Gremlion ?

[Karlos]

All the above tips work but I think it's even better to use catapult and cannonneers for the towers instead of any melee unit (such as dragons). For me it took usually one hit from catapult and the 11000 hp tower was gone. If not, cannonneers would finish it. And if Zilgadis didn't summon one, both ranged units can attack him directly. Cannonneers are normally completely useless but here they proved effective.