Hell sword vs Wraith sword vs Blood thorn

[Turin]

FrankTrollman said:

A Wraithsword against Ermor is just an expensive two-handed piece of junk. You'd way rather have a charcoal shield and a herald lance. A Blood Thorn against an army of Mechanical Men is worse than a Thorn Spear.

-Frank

lifestealing works against undead(ermor etc) . It just doesn´t work against lifeless units(mech men, most other constructs).
The reason lifedraining is so important is not the nice hp gain effect, but mainly the fatigue stealing aspect.
A high prot, high def SC with 90 fatigue and 300 hp is very easy to kill, a high prot high def sc with 0 fatigue and 50 hp is far harder to kill.