I just noticed something, on a base SoLs damage component is actually a life steal component if you got the vampiric trait (really easy to test on a single mob). Not that it really makes the active any more useful, but i think that it does explain why it falls from a 2.5 Damage : 1 Heal to 1 Damage : 2.5 Heal ratio, it level scales like the trait (as in kittenty).
Maybe the first bug that a necro could actually use as a exploit, probably not but still there is hope~
P.S. never got why it isnt a true steal dealing like 1k base and then stealing how much damage it dealt.
When life gives you lemon, ask if its from a anime or manga.