The assassin's plans are to strike during the battle, at the most dangerous or important foes her can find; leaders or powerful heroes. He carries an entire quiver of poisoned arrows, and is quite adept in their use, as well as being skilled at delivering dangerous blows to vital areas. He has plans to move into an abandoned warehouse, one of many, and should have little difficulty navigating the city, unseen. Unless, of course, Draiss interferes.