Originally Posted by Lordofluxuary
i see your points but as for the second item it is not vamp since it is restored and not leeched from the target. also as for the kass aspect it is but it depends when and how you choose to build or upgrade kass. for your point about it being more than taric's passive it would be 160 to be exact but yes it would out do it but again different champ not exactly for them. then again all items are really about preference because when using a champ we all want something and when fighting a champ we fell they should not have certain things. but is mana restoration really that bad, i don't really like having all that extra gold in some games that run 50 and 60 minutes long so upgrades don't always hurt but that's why i ask for input.
Vamp is also just restoration, because it's based on your damage numbers, not on how much damage you dealt to their HP bar (if I crit for 500 more than a minion's HP, I still get the full heal value, it doesn't stop at the kill point).
There is no Kassadin player who maxes W over Q or E, because a near-3 second silence is too good to pass up, and the AoE damage on his E is amazing as well. W is his 1-point skill, and also the one he picks up at level 4.
True, Taric would need 160 if the target has 0 Armor, but any more and he needs more damage or Armor Pen. Again, Taric never hits that much AD.
Mana Vamp sounds like a cool idea, but it's not really balanced with consideration of newer champions. Older champions like Tristana and Sion wouldn't be overpowered with it (they've got 80-100 mana costs on most their spells), but newer champs like Graves and Wukong have much lower mana costs and would end up too powerful.
Point in case: the only thing necessary to do with mana is to revise older champions' costs/pools.