From my exp.:
1) don't show yourself on street at night until you're ready;
2) you are supposed to meet Del anyway some night chasing some named Shadow thief, though the district and night are more or less random. I've met them in the Promenade, on the Bridge, at the Gates and, IMO, even in the Government District, too. So, most probably, you'll meet him anyway, just have a patience and 5,000 for license
![Wink ;)](./images/smilies/)
In fact Turn Undead level high enough is more of use then wizard spells.
One more note. Both chaser and chase are evil, so if you'd use Holy Smite either will be hurt and turn upon you. No penalties, only a bit confusing.
Hope i haven't mistaken the vampire. though,
L.