Originally Posted by Landa
The best would be a combination of both. Since magic pen is primary in marks and ap on glyphs.
9th Talent+boots+Guise = 15% +20 +20 magic penetration. For 2.3k total money, on items that are core for you even without the penetration.
15% pen reduction on top of a -40 ABSOLUTE reduction, when most heroes start with 30 base
And that's not even including the odd Specced Exhaust that kills another 25 ABSOLUTE.
OR any other good items like Void staff (still 40% , still awesome) or Lich staff (-20 reduction AOE)
You don't need magic pen runes duder, sorry. Hell, you probably don't even need the talent anymore.