That makes things a might bit easier on Denzral. Moving from the border of the White Tower's city to the mid-city is a low difficult roll, now that you are in the sewers. You only needed a success and bagged four.
You do come upon patrols in the sewers. These are only two-man patrols, as the sewerways are not large enough to admit three-man patrols, not in that bulky armor of theirs.
Denzral is, apparently, quite comfortable sneaking about. He beats the Intrusion check for moving from mid-city to inner-city by two successes for a total of four. Nobody notices you slipping from alley to alley.
The inner-city has a higher number of patrols moving about, all three-man groups. Occasionally you spot one of the leaders- a trooper with bulkier armor and a bigger rifle- asking for reports from other patrols.
Two successes does it. You listen in.
"Anything to report?" the commander asks the troopers.
"No, sir" the first says.
"All quiet, sir," the second says.
There is an awkward pause.
"So, Commander, is there any added kick from the Dz91? I know it's got more stopping power than the Dz78s that we carry..."
They start prattling on about rifles.