I feel like you gotta know the party a little bit... If they aren't the type to talk their way out of a problem, then the monologue has to happen from some relative safety instead of within arms reach of the not-paralyzed barbarian. Hold person exists. Magic Mouth. Message. Hell, a big ol' balcony above the party.
Else you gotta have a back-up plan like fallout where the players get the information from a journal or something - maybe it isn't as clearly laid out and it's harder to follow the breadcrumbs but the party isn't just lost in the wind looking for the next guy to punch.
