I had a grand time with this mod!
If you bring weapons of mass destruction like a regular Helldivers mission, of course it's gonna be insanely easy. These enemies were designed as a pressure compliment to more complex Illuminate forces. I don't think that's what you should try using the mod for, because even a thousand Voteless will never be enough against a tank or a mech.
I've been bringing just a primary and secondary, a supply pack, and the ActionCam mod for a lower FoV. And let me tell you, that was a very frightening 40 minutes! It feels like a proper horror game meets horde shooter. There was never a dull moment as I juggled the objectives or dodged between patrols.
Highly recommend for a change of pace!