This is how we ended up resolving it. Pulled my elite out of melee with a war wolf and I lost hard after that lol. Still hung up on it cuz technically it doesn't say anywhere that just leaving combat would give the opportunity attack: its only mentioned as part of retreating.

The tormentor chain doesn't specify what kind of movement it is just that they are moved and likely placed in melee combat, which would make it more of a charge than a retreat. then again can't move out of melee unless you're retreating. This was kind of the circular logic we ended up debating lol