So ad carries can build it anytime in the game and won't be useless against squishy targets too. Mages have 
which has full magic penetration why would 
and 
just have "bonus" armor penetration ? Like it is now you're only able to build it as a 3rd/4th item which is kinda late because if you build it early the only thing which is not useless on this item for laning is the 50 ad it gives which is a little more than a 
which costs 1300.
Shadòw3 votessince when are ADCs supposed to be effective against squishy targets too?
we all see on 
how that shit works out
NonProdigy4 votesWhat is that supposed to mean? Ad carries are meant to deal dmg that's why they're so squishy themselves and can die instantly due to a mistake. Vayne's 2 item powerspike is indeed a problem but I don't see how reworking last whisper items would make ad carries broken.
Shadòw2 votesADCs are supposed to shred tanks, not oneshot squishies.
that's what assassins and mages are for.
NonProdigy2 votesEven if that was the case, as you can see it doesn't work like that, only one who can really "shred" tanks is vayne. Try hitting a poppy or a maokai with caitlyn/lucian, even with a lord dominiks their autos do like 80-90 dmg max.
Shadòw2 votesthen you are doing something wrong.
is exactly the item you want to get against tanks.
ADCs have sustained damage and are supposed to take tanks down, not killing squishies.
NonProdigy1 votesSupposing all these things you said are correct, you still can't buy this item as a first or second item... the earliest you can get it is as a 3rd item (you won't win lane with that item neither will you be able to fight assassin's/mages back) . Till then you're useless against tanks and squishies and till then the game is usually already decided. That's the problem.
Shadòw1 votesTil then tanks don't exist because they usually don't have items too.
apart from the fact that ADCs are supposed to be late game carries.
NonProdigy1 votesThat's not true, sunfire cap costs 2900 for example I think. With just that and ninja tabis someone is real tanky. Besides that, games are already decided at the 20 minute mark, when is late game supposed to be? 40 minutes? Well, you're telling me ADCs are meant to be useless for 35-40 minutes while most games won't even last that long.
Shadòw1 votesand that's because of the current meta, but what do you want?
that ADCs are early strong AND still be hypercarries when it actually comes to late. no thanks.
NonProdigy1 votesNo, I want them to be viable throughout the whole game (not strong neither useless), I guess it's too much to ask.
Sahn Uzal2 votesTo get power in the early/midgame you'd need to lose power in the lategame, you do realise that, right?
NonProdigy1 votesThe famous lategame which never happens? Yes, I do.
Jbels1 votes[{quoted}](name=Tidal Tyrant,realm=EUW,application-id=3ErqAdtq,discussion-id=Wt6e3jeK,comment-id=00000000000000000000000000000000000000000000,timestamp=2017-01-15T14:09:55.262+0000)
To get power in the early/midgame you'd need to lose power in the lategame, you do realise that, right?
>.>
Shadòw1 votesit is because ADCs do too much in late game.
they would have to rebalance the whole game which would cause gigantic balance issues
Ahristocats2 votesYes please
we need 80% ban rate zed again
NonProdigy2 votesMake it available only for ranged champions, there you go.
Sahn Uzal3 votesNot before 
etc are Melee only.
NonProdigy2 votesWhy would these items be for Melee only? Assassin's are already able to one shot squishies, ad carries can't. Ad carries though can't shred tanks too, so what's the role of an ad carry now? To be useless till the game goes in the 40 minute mark? Besides that there's no ad carry who uses those items you mentioned and is close to viable right now.
h5LYF41Lam1 votesAPCS high base damage+flat magic pene+strong void staff=u ded no matter wut you build. high base damage+flat magic pene+weak void staff=build mr
ADCS Low base damage+no flat armor pene/lethality+lord dominics=you can kill tanks Low base damage+no flat armor pene/lethality+weak % armor pene item=youre useless. Note: some adcs still build yumus and other lethality items,but these builds fall of in the late game,even if you end up having 50 armor pene as long as you dont have crit you will fall of as adc.
Asayake 5150glow1 votesAPCS high base damage+flat magic pene+strong void staff=u ded no matter wut you build. high base damage+flat magic pene+weak void staff=build mr
ADCS Low base damage+no flat armor pene/lethality+lord dominics=you can kill tanks Low base damage+no flat armor pene/lethality+weak % armor pene item=youre useless. Note: some adcs still build yumus and other lethality items,but these builds fall of in the late game,even if you end up having 50 armor pene as long as you dont have crit you will fall of as adc.
Why do you not count AP for the ADC's, and AD, attack speed, and crit for the ADC's?