Alrighty, I am going to answer this again, I have posted this several times but people keep asking it.
Just because a spell does physical damage does NOT mean it is affected by things that apply on hit, this literally means everything you mentioned. Life steal, LPH, DS, CB, OW etc. Skills will ONLY apply these on-hit affects if the skill's damage scales from your weapon's damage, such as Shuriken Flip, Blade Shield, Shield Throw, etc. Murder of Crows has nothing to do with weapon damage, so it will not apply any of those.