Wait sooo would krogs slam with ripper apply rip to all enemies then?
nope, this is one of the interactions i need to find more clear language for but in general "On Attack" only applies to the primary target. So like Ripper or Gravity Hammer will only affect the closest enemy (the primary target of Slam and most other attacks). Items like Finisher or Unerring Arrow directly affect the damage of an attack so they do affect every target for Slam. One of the main sources of confusion is that Stagger's wording is unclear, it does apply to everyone Krog hits with attacks