So what does reduced lifesteal mean EXACTLY (invasion)
Does it mean the stat? Or does it mean all types or healing from damaging something, like 
Does it mean the stat? Or does it mean all types or healing from damaging something, like 
It means the stat. The healing you receive from Lifesteal is X% reduced.
Can imagine but without appropriate expectation someone coming in here and say, "but you do take 18 percent damage for the spells you deal damage with in an area when you have Gunblade! I know because one time the death review box told me that my own Gunblade killed me!"