Gremlins can work together to exploit.

Killed a Gremlin Mender (rather painfully, using all elemental gear) and he fell over on the floor, perhaps flopping about a little, but ultimately dead.
Then, Gremlin Mender buddy pops up and shouts 'Arise!' and twirls his twig-with-a-crystal in the air chanting some ritual. The rather dead gremlin arises, only with a couple patches of Gremlin pelt remaining on the floor.

Anyway, rather-dead-Mender comes back to life behind the blue force field that blocks monsters from passing. (Can somebody please bring me the proper name of this 'blue forcefield'?)

Picture:
http://imgur.com/NoSuxD2

Currently testing to see if it's possible for Gremlins to exit the boundaries alike to how Wolvers used to.