Talk:Karthus/@comment-11272698-20140607194944/@comment-6000413-20140609131356

No penetration items and runes? With your high base damage you should at least get a penetration item, depending on your playstyle:

- void staff for full damage kiting from behind a wall of tanks,

- abyssal if you want to get in the middle of the fray,

- liandry for some of both.

Your wall shreds some MR, but I fell you need something stronger and  more reliable to exploit your damage.