Tanks feel squishy because itemizing for optimum EHP is nearly impossible
Effective Hit Points is basically how much HP you effectively have against a given damage type when your damage reduction is taken into account. Assuming your opponents have no %Pen at all, to get optimum EHP you need about 1500 HP for every 100 resist you've got. If the baddies on the other team are rocking with %Pen masteries and Void/Whisper, then that jumps up to 2400 HP for every 100 resist.
That's... seriously kind of absurd.
Getting 200 armor is pretty darn easy. How easy is it to get 4800 HP?
That is why Tanks feel like they're evaporating when the ADC or Zed decides that it's time for you to die.
The game desperately needs a real HP item. Or an HP equivalent of Deathcap. Or something. Because right now hitting that optimum isn't going to happen and between crazy penetration levels combined with items like Torment and BotRK, Tanks are going to continue exploding like paper bags filled with gravy.
, and then you usually choose from among
depending on which carry you are.
is generally the wrong buy for most ADCs. Some exception cases:
loves on-hit effects, so it's core on her.
occasionally buys it because it provides some self peel and is reasonably synergistic with his W.
and