Fun fact about tear (right now as it stands in live) and everything it uses (AA/Manamune).
The tooltip says 3 seconds but you can spam skills as fast as you want and you'll still get the mana bonus. There is some strange threshold where you can spam 3-5 skills before you even notice that it has a cooldown (the items have cooldown things now) and it slowly builds up to 3 seconds.
Is this fixed in the newer items being made?
Last I heard, the live version has an internal 'reservoir system' where you can fire a couple spells within that three seconds and still get multiple charges, it only truly goes on cooldown once all the reservoir charges are expended.
This is primarily why I'm reticent to make the change.
I don't want Kassadin to get even more nuts with an activatable shield. I'm not too worried about Manamune though, as it's much better on RADC than bruisers and melee.
Not like we won't have a LOOOT of ridiculous items incoming, no need to tweak them upwards just yet xP