Talk:Riven/@comment-25553136-20141025122709/@comment-23835547-20141030040733

One thing about the above builds is that if the enemy goes health you go brutalizer. If they go armor you go straight AD.

Going flat armor pen first vs someone stacking armor is a common error people do not realize. If they get a chain vest then brutalizer does not counter it, it is the other way around. If they get a brutalizer you get armor.

These are the damage increasements from brutalizer vs armor.

If the enemy has 10 armor its a 10% increase in damage. If they have 100 its 5.263% increas. 200 is 3.43%

As armor increases brutalizer gets worse.

If some has 45 armor they would take (100/(100+45))=68.97% of physical damage. With Brut (100/(100+35))=74.07%

At 85 (with chain vest) they would take (100/(100+85))=54.05% of physical damge. With Brut (100/(100+75))=57.14%

74.07-68.97=5.1                          57.14-54.05=3.09                      Flat Armor pen does not counter armor stacking, only percent armor pen counters armor stacking.

Although this item goes really well with Riven so getting it even if they stack armor its not bad.