I feel like Phantom Dancer is such an underrated item
I know it's only useful on ADCs and some Fighters but that 12% damage reduction and free movespeed passive can be the difference between life and death and some duels. I've found it especially useful on champions like Jhin, Vayne, GP, hell I've even tried it on Rengar and Master Yi and it makes them much better duelists coupled with the Warrior enchantment smite.
. Stat's are ridiculous, Lament is ridiculous, and Spectral Dance is just broken.