Effectively, we can definitely hang Arandor. And after that, there will be a third hint, a possible mistake by Grey, and a more certain solution pointing to Gur.
Overall, I suggest trying to solve the first hint regarding GoedenDag's murder as Gur. Maybe something will come of it.
Added after 3 minutes
The Whites can restore the parity themselves.
I have no doubt about that. But you'd have to be really, really stupid or just not want to play.