When you are spamming abilities with 30% cdr with essence reaver, you won't run out of mana, and it is reasonable.
But when you are doing it with blackcleaver and youmuus, there is definitely something wrong with mana cost in your abilities.
Valexfor3 votesNever touch adc or assassins on the boards. NEVER, it's just a tip but it's better this way, no matter how much sense you make, adc always think they have the worst treatment of all. That said you are right, most adc which should be mana gated aren't really so lately...
Zero Skill Tank2 votesWait, you means that something that is not a mage should actually be gated by resources?
The Deckowner2 votesyou should add kappa or /s at the end so people realize it's a joke
PhDs Nuts1 votesADCs (and I assume you mean Lucian) that spam abilities with 
DO run out of mana. I don't get this thread.
I feel like you're forgetting about Ocean Dragon.
The Deckowner2 votesnot with the 0 mana cost E
Ralanr1 votesOnly at max level and he doesn't max that first.
The Deckowner1 votes50 mana on all abilities, that is lower than basically all of the mages.
PhDs Nuts1 votes[{quoted}](name=The Deckowner,realm=NA,application-id=3ErqAdtq,discussion-id=8AAoenkN,comment-id=0002000000000000,timestamp=2016-05-24T16:31:14.522+0000)
50 mana on all abilities, that is lower than basically all of the mages.
Lucian is essentially an AD mage.
The Deckowner1 votesmobile and isn't really gated by mana*
PhDs Nuts1 votes[{quoted}](name=The Deckowner,realm=NA,application-id=3ErqAdtq,discussion-id=8AAoenkN,comment-id=000200000000000000000000,timestamp=2016-05-24T16:35:59.094+0000)
mobile and isn't really gated by mana*
His Q scales up to 70 mana and his W costs 50. He needs to use at least his Q for waveclear.
The Deckowner1 votesexcept he has one of the higher base mana pools(~1k at 18) and 70 mana really isn't much. many champions start at more than 70 mana and scale to 90