I made some in depths for some of the enemies in bo3. So im gonna wrap it up before I move on to something else. Here is some data I have gathered for other enemies you meet in shadows of evil. Margwa has already been covered in another post. I linked it at the bottom.
Parasite/elemental
I am going to refer to elemental as raps from here.
Vermin type enemy for Shadows of evil. Revelation (parasite only)
Vermin rounds randomly start on round 5 to 7. Then every 4 to 6 rounds after. First vermin round is always just parasite, the second is always raps. On the third and after they will combine. One part for the apothicon servant will start dropping from killing them on the third special round and onward. If you are lucky you can get the part on round 14 or if you are really unlucky, then you wont even get the part that round and have to wait for the next special round. Or if it is dropped from one of the ones that spawn in with normal zombies. It can drop from both parasite and raps. After opening pap then raps will spawn with normal zombies after round 12. Parasites will spawn with normal zombies after the second special round.
Both:
you get 10 point for damage and 70 points per kill. You do not get extra points for the way you kill them.
Their health formula is this:
Health = 50*round number.
Caps at 1600 hp. (Same cap as hellhounds.)
They are immune to AAT.
Raps:
In solo there will spawn in 10.
2p: 18
3p: 28
4p: 34
Max 4 alive per player. Max 13 alive on the map at once.
They explode when they are close or after some time. Doing enough damage to be annoying, but not enough to be a big threat. Danger closest gobble gum makes you immune to their damage.
Parasite:
Spawn:
For solo 10 will spawn a round.
For more than one player the formula is: 10*players*0.75
Max 5 alive per player. Max 16 alive on the map at once.
They will 1 spawn when you destroy a margwa head. There is also a chance you can spawn one from a green pod.
Keepers:
They will spawn 2 after picking up ritual part. 4 will spawn first time you enter underground area and they will spawn in big number during a ritual.
You get 10 points for damaging them but 0 points for killing them.
They have the same health as a zombie on the round they spawn in on and do the same amout of damage.
If you dont kill them, but keep them alive and start the ritual, then they will respawn as zombies you can kill for more points.
Might come back to this later, if I get more information.
Margwa in depth: Margwa