I have checked a lot of times... I think the darters just happened to move on it's own. (not chasing)
Think about it, Miffy vokes then runs to put Faf into position.
Jones uses invincible to gain hate. (for some dumb reason)
From there I dunno...
I can see what you're saying about Miffy claiming a Darter, lol if I had to bet I'd give it 50/50 odds on claiming faf or darter -_-
Looking a little closer I see the first hit that Miffy takes is 80 damage flat...
Hmmm, I think it was a Darter that miffy pulled unless faf only does 80 damage to a taru pld lol
Edit: I didn't see Jones voke at all, just invincible to get the dragons attention...
Thought here... what if people had a assist macro with voke built in?
PLD uses invincible to grab attention while everyone else is spamming assist macro to try and claim.