User blog comment:Willbachbakal/(Item Concept) Revamping Life Steal/@comment-12443575-20150825183933/@comment-1330314-20150825185350

Moving away from damage dealt and towards a constant amount was one of the core goals of the above changes. Right now, life steal depends on a few too many stats to work (crit and damage reduction/armor penetration and reduction), and since I also changed crit, which would no longer work with life steal, I think it would also be worth changing LS to the above amounts so that it would independently of the opponent's armor or your own armor pen. The overall results should be about the same for marksmen in most cases, though fighters and assassins willing to itemize for life steal without opting into crit would find themselves more at ease too.