Alchemist
Alchemist is a pain to fight. not only does she fight with dual pistols, like Hunter, due to the claw-like shape of said pistols, they double as melee weapons. Her strategy mainly consists of teleporting out of harms way, only to hit your echelon on its weak spot. Using an echelon with Machine gun dolls in the back and shotgun dolls in the front can therefore be a good idea.