Talk:Karthus/@comment-8506165-20140305190817

Why does everyone and their dog rush RoA on Karthus? It's really not even that good on him - Rylai's gives about as much HP, same amount of AP - unless you count Archangel's, which means RoA gives 20 more, but my counter-argument to that would be that Rylai's amplifies Liandry's, so either can synergise with other items in your build. More importantly: you can now kite with Karthus using Q. I know what I'd rather have on my side in a fight against your average frontliner - 150 extra HP or kiting potential.

And this isn't even mentioning that Defile becomes an AOE slow field around you, the slows from that and your Qs makes it easier to keep people in your spell range when you're in spirit form, and Rylai's is about the same price as RoA anyway with an arguably easier build path.