Talk:Karthus/@comment-62.194.141.153-20110915162238/@comment-1663285-20110928054201

Having multiple AAs being fully maxed won't do anything since you only gain 1k mana at max no matter how many Tear items you have, but having 2 different Tear items makes them both charge your mana at the same time for each spell cast, so 8 mana per cast instead of 4. The only thing that stacks between AAs are the passive AP conversion, charge per cast (I think, not sure if it stacks between the same item or only different ones), and the regeneration.