FTE and Locking Mobs - Verina Tomb

[Quidello]

What are the rules on FTE for mobs like Verina Tomb?

After the earthquake today, a guildie and I, rushed to Verina to attempt to duo her. 60 Shaman and 60 Enchanter. We saw almost nobody in the zone, and thought we lucked out. I went to grab a pet, and my guildie went to check the spawn. He found another 60 Shaman engaging Verina.

I had my pet ready for the fight shortly after, but we could not pull the mob because the other shaman had engaged. This went on for nearly 3 minutes. She was keeping the mob aggroed but not damaging it. Then after a while, her reinforcements show up in waves, and they kill Verina.

I am not sure about the official rules on this, but I don't see how tying up a mob as contested as Verina Tomb can be fair play. We were there and ready to pull, but she was holding it. She got FTE, but she wasnt going to kill it herself. We thought she was going to solo it, but my guildie noticed something was off when she wasn't even doing any damage. She said that she didn't do damage because she didn't want to get summoned, which would be fine, that is normal for pulling, but this was 3 or more minutes. None of the members of her force were in the zone when she engaged. They cited the FTE rule. But again, with FTE, don't you have to intend to kill it shortly after the pull? As in, do damage within 3 minutes at least? I wish I had screen shotted it, but I was too mad at what I perceived to be cheating. She even said to her group in say something like, "Sorry, I ran out of mana kiting her". If you hold a mob on a shaman long enough to go oom, I think that can be considered against the rules. I could be wrong.

I am pretty sure there is nothing that can be done at this point, but is this against the rules? Would be good to know. Maybe our shaman can do the same next time if this is considered fair play.

Thanks in advance.