Myers sent the divine beast to the Imperial City of the Abyss specifically to find out if her most troublesome enemy was dead. The result proved rather disappointing. However, since the heroic spirits were unable to leave the cemetery, there was no need for her to rush into things as well.
Leaving the cemetery required help from outside, and only Saleen knew of the location of the imperial city. There was no one else capable of helping them.
From the looks of things, Saleen already knew what the general has done, and there was no way he would have stood with the general again. That worked just fine with her. She had no need for Saleen to serve her. He was a mage after all, and there was no way he could have done so.
She was content to have someone like Saleen stay put and do nothing rash.
