Wow, I had to look twice to see that you HADN'T written "Outlaw Heir" as the playbook. I think your assumptions really translated there ;)
Anyway, I don't have too much truck for playbook agnostic responses, but sure, Draw Someone Out would probably be my go-to there. It would end up something like:
Player: "Hang on, lemme back that up a shade. I draw my sword letting it hang gripped by my side, narrow my eyes and say, 'If you will not bend to your oaths, there will be war between us. Surely we can find ground before words cannot be taken back.' I'm drawing him out."
MC: Oooh, goody. Do your worst! Roll +hot.
Less agnostic-like, with the Outlaw Heir, maybe she Draw's Them Out, maybe she prays to Her Parents Blood.
Player: "I take out my sword and kneel, setting the point to the ground. I close my eyes and pray, saying to myself, "Mother, guide me. This oathbreaker will not aid me, not with what I have. I must convince him if I'm to have a chance at regaining our lands. Tell me what I must do, and I'll shed no tear until I sit in my rightful hall.'"
Or maybe she simply is a Supplicant.
Player: "After a tense moment with my sword out, I put it back in it's sheath. 'Please, dear lord, these times are unjust and you know it well. Surely you must be have some advice for what I must do, how I can gain your aid?' I'm not begging, but my question demands answer."
The War-Herald my likewise pray, but to the gods of war, loudly and to the sky, in full view of the oathbreaking lord, maybe breaking his sword in offering. Or perhaps he just gestures to his lieutenant and says something like you said, "If you won't bend your knee, I'll have it bent for you. Mharles, have the men kill our kindly lord's troops until such time as he kneels before me. Make sure those who are about to die know why." which maybe triggers Wolfpack, maybe doesn't.
The Wicker Wise just smirks and watches as the lord drinks from his goblet, remembering fondly his moments alone in the kitchens, before mentioning that he has an antidote in exchange for a new oath, "lords change, after all."
The Troll Killer probably just growls before she shouts at him, "You will do as I say! Kneel, and swear on your gods that you'll follow me into the gates of hell should I ask, or your blood will run through these halls," before rolling +hard on her Commanding Presence. I'd like to see the lord who freezes or backs away in his own hall, poor sot.
The Dragon Herald, as far as I'm concerned, just says something to the degree of, "Do be careful. When the dragons come for those of the blood of eagles, you will want me to speak on your behalf I'm sure," before dropping the mic and walking out. Maybe just after using The Sight to customize that threat to the lord's greatest fears and sins.