ATTACK DAMAGE :  ⇒ 45
Attack damage decreased. Bonus armor penetration shifted to total armor penetration. Bonus damage against higher-health targets removed.
Total armor penetration is stronger than bonus, meaning LDR scales better with itself. To to keep the focus on the armor penetration rather than raw damage output, we're trimming some attack damage and pushing the price point higher.
TOTAL COST : [2600 gold] ⇒ 2800 gold
| BUILD PATH :
||Last Whisper +
||[Giant Slayer + 300 gold]
||Pickaxe + 625 gold
ATTACK DAMAGE :  ⇒ 40
GIANT SLAYER Grants 0-20% (based on health difference) bonus physical damage against enemy champions with greater maximum health than you.
ARMOR PENETRATION : [35% bonus] ⇒ 35% total armor penetration
HEALTH DIFFERENCE FOR MAX DAMAGE :  ⇒ 2000
COST : [2700 gold] ⇒ 2600 gold
ARMOR PENETRATION : [45% bonus armor] ⇒ 35% bonus armor
GIANT SLAYER DAMAGE AMP : [15%] ⇒ 20%
Damage bonus requires enemies to have more health than before.
Lord Dominik’s draws an interesting parallel with The Black Cleaver: one scales with enemy health, the other with enemy armor. There’s no right way to itemize against that combination, so to keep LDR+Cleaver from taking over as the new flavor-of-the-month build, we’re making Lord Dominik’s far less tolerant of Cleaver’s bonus health. Fortunately, this shouldn’t impact champs who are happy to buy Lord Dominik’s on its own.
PASSIVE : Deal +1.5% physical damage per  ⇒ 100 maximum health difference against targets with greater max health than you (up to +15%)
MAXIMUM BONUS THRESHOLD : [500 max health difference] ⇒ 1000 max health difference
Last Whisper's upgrades give marksmen options to pierce through defense-stacking foes, sacrificing generic damage for effectiveness against tanks. In their current state, however, these 'options' are only viable when their effects can be applied to multiple enemies. At 40 AD, Lord Dominik's and Mortal Reminder force an excessively high damage tradeoff versus, say, The Bloodthirster or Mercurial Scimitar. In other words, investing in them hamstrings a marksman's ability to kill anything that's not a tank. We're giving Lord Dominik’s and Mortal Reminder a bump so itemizing against the enemy frontline doesn't forfeit your ability to fight their backline.
ATTACK DAMAGE :  ⇒ 50
More bonus armor penetration!
Last Whisper's upgrades don't have enough of a payoff, even when you'd find their unique effects useful. Now investing gold into either the Giant Slayer or Executioner's upgrade will have a little more 'oomph'.
BONUS ARMOR PENETRATION : [40%] ⇒ 45%
when giant slaying isn't enough, you have my regards
TOTAL cost : 2700 gold
BUILD path : Last Whisper + Giant Slayer + 400 gold
ATTACK damage : 40
unique passive : Giant Slayer: Grants up to +15% damage against enemy champions with greater maximum health than you (+1.5% damage per 50 health difference, maxing at 500 health difference)
unique passive : Last Whisper: 40% bonus armor penetration