Did you know that when you stack Black Cleaver, Lord Dominik's, and Lethality...
You bring a 300 armor target down to ~74, assuming 90 base armor?
#That's taking 4520g away from someone, btw.
+runes/masteries brings you there; not exactly giving up HP either, are we? "Should have bought more HP if they bought pen" doesn't apply as a counterargument here.
######edit:You'd probably have Spirit Visage and probably some HP/damage item on top of that, but they don't change the argument so they're irrelevant...**including this because too many people lack common sense apparently, thinking I'm comparing 6 items to 4. **
There's no reason you should be able to invalidate nearly 110% of someone's purchased armor (again, 4520g value) while still getting 40% CDR via itemization (
), a 15% damage multiplier(
), nearly 240 true damage (
), noticeable defensive stats+10 second spellshield (
) , and without trading any AD for it (285 bonus AD; ~400 total).
I know this build isn't a glaring issue at the moment, but the fact still stands that there's no real option that you're 'giving up' by purchasing this combination, considering how exponentially more effective each one is with each additional item listed above.
Just saying...maybe you should gate some pen/reduction interactions. Getting all of that shit while taking 4520g away from someone seems a little over the top.
If tanks become strong after the vanguard update, I can guarantee this build becomes very common.
and
.
or melee's could take the build keep in mind that
too now that some people pointed it out.

for ad focused frontline
or
for ap focused frontliners
cuts out 40% of their regeneration and healing.
.
, which you're spending 3k gold on 800 Hp for, since the regen rarely applies outside of poke comps and straight objectives, which go hand-in-hand.