Grievous wounds items need a buff

Items like executioners and morello's used to counter life steal/ health regen / spell vamp isn't very reliable or an effective counter measure for this type of sustain. While capping hp makes you vulnerable to and stacking MR and Armor is countered by more than one effective piercing items ( etc ) champions that have a large sustain basis on life steal ( like rek sai, renekton, akali build with spell vamp ) need to be blown up as a counter measure or else someone will die. I've dealt with situations such as me assisting with morello's fighting a rek sai for example and the rek sai ends up with about 70% hp when in the initial fight he was around 20 - 30% ish.

I would think grievous wounds should be more lethal or at the very least the items that carry it should start out applying it around 70% hp or even 80%.