Ring of the Sacrilegious Soul does not cast Raise Skeleton as often as it says. Description says it casts Raise Skeleton every 2.0-1.0 seconds. On my ring it should cast it every 1.0 seconds, but in reality, it casts it like every 8 seconds.
I also use Corpse Tendrils which the ring automatically uses every 8.0 seconds, does this affect how often Raise Skeleton gets casted? I have tested Corpse Explosion and it works every 1.0 seconds, even if I also have Corpse Tendrils and Raise Skeleton.