Originally Posted by Anivias Chosen
Your not cutting the flat pen in half, it calculates first, then reduction then percent.
Which basically reduces the effectiveness of your flat pen by half.
100 MR - 40 Magic Pen (Flat) = 60 MR.
60 / 2 (void staff/mastery) = 30 MR
100 MR / 2(void staff/mastery) = 50 MR
50 MR vs 30 MR, you're only getting 20 instead of 40 from your flat pen.
Originally Posted by Layotees
This makes no sense. 10 magic pen reduces the effectiveness of 15% magic reduction by 1.5 points of MR. Boots, Scepter, and runes only makes this talent 5 magic pen worse, assuming an opponent has enough magic resist for that to even matter, in which case you want a void staff instead of a scepter anyway.
That's what I said, flat pen makes the mastery worse. If you're flat pen is leaving the person with 20 MR, that 15% reduction isn't doing much.