Originally Posted by Typhoo Tea
Worth buying warmogs on?
eh, i wouldn't, just because there are better items to slot in there in place of warmogs.
Rylai's, for example, gives a very good chunk of health and gives a passive slow to all of his spells
you could also go ROA, which when fully charges gives more health plus mana than Rylai's.
Archangel's staff is also a good item to slot in there since it gives lots of mana, and 3% AP for your total mana.
warmogs is fine and all, but just not optimal for karthus.