Talk:Cassiopeia/@comment-26203093-20160522230607/@comment-24055932-20160523112035

Kinda messed up there, treated as if it was. So -200 AP + whatever you got in your runes. So that's 20% less heal, which hurts quite a bit. However, if you couple in auto-attacks, the mana consumption there will make up for it, as long as your mana lasts.

I don't really think there can be a CDR overkill. Cassiopeia's CDR is equivalent to your adc's AS and it also helps keeping up the poison, so it increases your damage majorly.