In UC in the mage quarter up by where you would spawn taking the shat portal or a mages portal theres a huge skeleton head right there beside you...simply jump towards it and you will go inside it and be on a ledge, hidden inside the skull and free to gank everyone that spawns(of course ally wont spawn there but im just giving you an idea of where its at...if needed will post a screenshot)
be sure to keep those NPCs beside the spawn point dead though or else they spawn guards.