If AD's had the same core item strength that AP's do:
Bloodthirster: 3% lifesteal, Ad, Attack speed, Lifesteal. (Mimicking ROA, having health sustain, resource sustain, and damage)
Atmas Impaler: Ad, Armor, Now gives untargetability and invulnerability for 2.5 seconds, now has end game stats. (Zhonyas hourglass)
Black Cleaver: Ad, Attack speed, Auto attacked targets take 10% more damage from your autoattacks (Mimicking Deathfire grasp)
Sword of the Divine: Attack speed, Armor, Small AD, gain short burst of attack speed on assist, full burst on kill. Lower your health the higher your lifesteal (Athenes)
Infinity Edge kinda already copies Rabadons.
Don't give me the "Oh AP's have to use abilities while AD's can just right click". A fed APC can burst a carry before they react, and AD's have single target damage while AP's can whipe out TEAMS.