Death's Dance on Pbe is going to be best on ADCs
30 mr and armor will make them a decent bit harder to burst not to mention the 30% damage reduction to be turned into bleed damage over time In some ways I admit adcs have no counter play to alot of mages who can 1 shot them from a safe range but this item might be a bit too much on them overall vs everything . Also its stats on pbe 3500 gold 60 AD 30 armor 30 mr 15% omni lifesteal and same passive Unique: Stores 30% of all post-mitigation physical and magic damage received, which is successively taken as damage over time true damage instead, dealing one-third of the stored damage every second.
as their cores, and champions who already struggle with them won't even be halfway mitigateable. There is no Mage counter items for a Garen who manages to get off a Q, and follow it up. There's no mage counter for a ghosting Darius.