Regarding the experimental Blade of the Ruined King changes
For those unaware:
>AD 25 to 45 >Attack speed 40% to 25% >Lifesteal 10% to 15% >Health drain on active removed
To be honest, I don't think these changes will make BorK more attractive as a first item on Marksmen. No one wants it. I mean, seriously, no one wants it as a first item. Everyone is better off with Lethality or Crit. Even Kog performs better starting with Wit's or Hurricane.
So how about something totally different?
Try giving it magic OnHit damage and a new passive that applies Lifesteal to all OnHit damage dealt. That might actually be worth buying for OnHit focused champions.
already lifesteals all on-hit dmg.