Tiny floating objects that move really fast and vehicles dont mix too well.
Lost souls will bounce off of your vheicle with almost no damage, however due to how vehicle damage works they will inflict enough damage to destroy weaker parts through military composite armor.
Meanwhile, they also can fly over walls to path to you/a sound, and additionally through vehicle gaps when you drive to attack you.
Their melee attack is strong, and their flame gouts cause enviornmental damage. They focus fire on what is typically the weakest body part (the least protected, which for me is often the head) and quickly overwhelm even what I would consider moderate armor in other situations.
All of the non-human Doom monsters can destroy a newbie survivor of mine in 3-5 turns of combat if I let them. Though after 10 or so days, when I have a gun and some skills its a little easier to kill imps.
Lost souls additionally have high speed hitandrun tactics, and have a high dodge in addition. Shoot them, as even though they are ‘hardtoshoot’ they will die to even modest skills and a gun.
They illuminate the areas around them too, so at night its better to avoid them entirely if you arent specificlly picking a fight with them. Most of the doom monsters have night vision superior to zombies.
You can melee most of the doom monsters with enough skill, though. I took down a cyberdemon in melee with some stat buffing. That guy has an attack of 5D20.
5D20 is well above the closest competing attacker, the zombie tank of mine. over 2x, iirc.
Correction: here are his stats
"speed":100,
"melee_skill":10,
"melee_dice":4,
"melee_dice_sides":20,
"melee_cut":20,
"dodge":1,
"armor_bash":18,
"armor_cut":21,
"armor_stab":12,
"armor_acid":6,
"armor_fire":12,
That pretty beastly, if you dont know what that means. He does 24-100 damage per attack, mitigates 20 damage per bullet, is almost immune to acid and is highly resistant to fire, is as fast as you, and has enough melee skill to hit non-god chatacters regularly