Talk:Magic penetration/@comment-84.188.77.27-20111219224004/@comment-4087140-20111220014639

I believe that Kayle's passive does stack multiplicatively; all of the effect stacking I've witnessed appears to work the same as having multiple items. However, this should be tested.

I see no reason why or  wouldn't work well with Kayle. Making an effective champion build is all about capitalizing on strengths already present, so that would certainly be worth a try. As a note, flat penetration is most effective against targets with low armor, whereas percent penetration is most effective against targets with high armor. So, using those items with Kayle would not make her particularly effective against either kind of opponent, but decently effective overall against any opponent.