Adrian looks on the masked bard and replies; "That's what my suggestion just moment ago covers; sending Shezzerade to scout for us as her teleportation is flawless and she can use it several times a day. She can enter where necromancer was and go unseen scout the place for us. She has magic to transport her to ethereal plane, so she would not be seen at all. Once she studies place and how much forces necromancer has, she can exit the building and take a look around where building is located and then return and report to us. So we know where necromancer is and depending how far it's from the watch head quarters we can either teleport outside the building, inside or even walk to there along with watch reinforcements."