How to deal with Gremlion ?

[Smash]

People really should posting their class, lvl, leadership and difficulty when making statement.

I have Mage on hard lvl 51 with 23k leadership and one thing i can say that bosses are really biased toward warrior like most of the game.

Their health pool is huge. I left with Zilgadis (Gremlion) and this Lizardman and one have 107k and other 120k of life. For mage this is little to high pool.

Gremlion look like have physical resistance as my Royal where doing less damage to him than to towers or he have just high defense.

Main problem for this bosses are their stomp strikes. Zilgadis have magical while Lizard looks like physical (it hit for like 8k on my Archmages but much less on my Paladins).
I have no physical resistance items and only one that give 20% to magic res :/.