Adrian shrugs on Selena's words as he still does not understand what is wrong using summoned creatures? Even if they are fiendish creatures but they were in needed power category so he could summon more than one aerial mount. If no one mounts second bat he takes off into air with two of them and casts haste spell so he can get quickly on the site and hoping he can delay departure of the wights, vampires or what not. If nothing else, very least spy them from distance.