-Aside from Cry of Fear ragdoll physics,somehow i got the NPC to stop attacking at the death animation corpse,i went to the code and make a little change,ENT.DisableDeathAnimationSCHED to false and ENT.DeathAnimationTime to 10 or higher, i still don't understand why disabling the schedual code will make anything better.
-If you want death ragdoll from slower,ENT.HasDeathRagdoll = true,if you want death ragdoll from other SNPC,just rename slower's physic file which named slower.phys so that it replace other .phys file that doesn't work,other slower variants file already have physic.