Talk:Karthus/@comment-1920011-20160112094406

Traditional builds seem really inefficient to me. AA+ROA gives a ton of mana so you can use E, but the AP ratio on E is pathetic. You would need 550 AP to double the damage on his E, whereas most mages need 350-400AP to double the damage of any given spell.

I prefer rushing morellonomicon for early cdr. That 20% cdr cuts a whole 40s off of his level 1 ult, which is huge. I then get rylais. Rylais with a bit of cdr makes it really easy to catch and permaslow a target to death with Q. Anyway, I do this mainly because I pick Karthus for his global presence; if I wanted to stand in the middle of fights and do aoe damage I would rather pick Swain.