Are bosses immune to sleep/poison

[Amon]

Trying to decide what to spec Erick into, Knives sounds like a massive single target damage but if Bosses are immune to both status then it is pointless imo.

[ウィッチ（？）]

Not all bosses are immune to status ailment. They do have weakness so those skill that inflict sleep/poison are useful in some place.

[Neosuduno]

I can confirm, bosses seem to resist sleep and paralyzing effects, but they are just as vulnerable to envenomed state as most monsters. That is one of the two tactics I use with Eric. Poison then exploit. The other is a crit build, using eagle dagger and one good side dagger, along with the assasin card from the silver race advanced challenge at +3. Murder style is cool.