Talk:Kog'Maw/@comment-5637787-20150324073319/@comment-4636093-20150324105335

For AD KogMaw, Hybrid pen marks are a must in order to do more damage with his abilities. It's also possible to go attack speed for more late game power but Kog doesn't exactly need more of that.

Seals can be ether flat armor or scaling health. In general Scaling runes are worse at level 1 compared to flat ones, however starting at times as early as level 6 they become equal, and then become even stronger than that. So when it comes to linear damage reductions (i.e: 1 point of health blocks 1 point of damage. 20 blocks 20, etc. Whereas 1 point of armor can block pretty much any value depending on how much armor you aready have) Scaling is better.

The blue ones I forget the name of will be ether Magic Resist or Scaling Magic Resist. I prefer scaling as my general default because once again, they become better at level 6. However you might also want flat MR if you're up against someone like a Sona or Leona who does a lot of magic damage (or in Leona's case little magic damage but so early on that it'll spell life or death before scaling runes have a chance to kick in).

Quintessences will be AD pretty much always. There isn't really any other good options to use for them.