I made a custom army on the request of a friend. He wanted an army that was made up of cultists carrying improvised weaponry backed up by suicide weapons that allow them to be able take down much more powerful foes.
Here's a little blurb describing what they're all about:
"Theorized by some to be an offshoot of more common havoc worship, Doomsday Cults take many shapes and sizes, but they all share a faith in the "Abyss", an eternal peace that will encompass the galaxy once all life ends. And, for that cause, Doomsday Cultists gleefully march to war, carrying stolen, improvised or unnatural weaponry and betraying all that they once held precious in a blaze of nihilistic joy that burns away friends and foes alike.
This Abyss seems to be more than a common delusion, for devoted cultists occasionally 'visit' or 'gaze into' it and return with strange gifts of eldritch creatures, psychic maladies or warped bodies.
Be it through sleeper cells of domestic terrorism, paramilitary warbands or deranged psykers and mutants, the Doomsday Cults work tirelessly to usher in
the Abyss and deliver us from the suffering that is existence."