Talk:Karthus/@comment-4870877-20160224102332/@comment-25904283-20160227010532

His early game is weak. He can harass, but he still loses most short trades (which are more common in mid lane). Assassins prey on him for days as he is very squishy, has no good CC, no good sustain/shield and zero mobility.

The most important objectives nowadays are turrets. Karthus waveclear is terrible when you need to siege or anti siege. Legend also said he has no AA, so very low push potential.

Last but not least, he might be the slowest scaling among sustain dps mages, which once again, just go against him in this meta.