Talk:Xerath/@comment-4012115-20111005155639/@comment-71.233.127.32-20111005190326

vs said 200 MR target VS is worth 47.6 mpen. That's usually around the area VS becomes useful.

There's basically no reason to skip Mpen reds. There's nothing better to put in that slot for any caster, AP reds give you crap and early game 8.5 flat mpen helps a lot more.