what would be a good title for arty?
thunderous eagle ( due to cannons and guns)
angel of death? (the fact his army killed thousands while losing very little)
the blade of the vale ( it sound cool)
He should just capture Lysa and have her trialed when she comes to the Eyrie. There is no saying what damage she could do if she is given any kind of power. Also it gives Littlefinger time to make plans if you don't immediately expose him.