It can take a LONNNNNNNNG time. Helps if your speachcraft is high, possibly your personality matters, too.
I've no idea if its co-incidence, but it sometimes seems to help if I 'change the subject' by admiring them, or even bribing 10 a couple of times before going back to taunting.
Do you EVER get a 'success' message? If so, its a matter of time till they start fighting, but some times it feels like you'll get carpal tunel hitting the 'persuassion/taunt' things over and over and over...
Oru
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