Ranged ADs which have strong dueling potential like Vayne and Graves can use this to further boost their dueling potential, making them difficult to take down if they are ahead, or giving them a better chance if they are behind.
Melee champions that focus on crit like Yasuo and Tryndamere generally use this because they are easier to kite and this item's passive helps with that problem. Also, Statikk Shiv is their only alternative for an attack speed/crit chance item.
ADCs that are having problems with assassins or burst mages can use this to allow them to have a better chance to survive their burst.
This item is a good alternative to Rapid Firecannon on caster-focused ADCs if you don't need the extra range.
Removed Unique Passive - Spectral Waltz: Grants ghosting and +7% movement speed while within 550 units of a visible enemy champion.
Removed Unique Passive - Lament: Grants 12% damage reduction against the last enemy champion you basic attacked (lasts for 10 seconds and refreshes with each basic attack).
New Unique Passive - Spectral Waltz: Basic attacking a champion grants ghosting and 7% bonus movement speed for 2 seconds.
New Unique Passive - Lifeline: If you would take damage that would reduce maximum health below 30%, you first gain a shield that absorbs 240 − 600 (based on level) damage for 2 seconds (90 second cooldown).