CR 3 is fine. As for the web business, I just meant the red text.
Are you OK with 20 ft. as the minimum size of the web?
Agreed to the 20 ft web also.
I think no treasure fits the flavor best. The drow don't pay them off, right?
All spider types are raised with an inbred respect for the spider rigger and never conceive of attacking one, even if the spider rigger attacks it.
They are as relentless in this task as normal giant spiders are at devouring prey. The spider rigger is more intelligent and responsive than its brutal kin, however, and it takes enough pride in its handiwork to attack bitterly any foe who deliberately severs the rigging or otherwise hampers the maneuverability of the vessel. Since the spider rigger plays such an important role aboard ship, it is the most important member of the Xakhun crew (next to the captain, of course) and is closely guarded.
It sounds like their tactics are to ignore foes unless the rigging or vessel are threatened, then attack with a vengeance.
We'll need to note that in the flavor as well.
That's reasonable to put into the tactics, though. Maybe something like this:
Spider riggers disdain combat, usually leaving fighting to the rest of the crew. However, they are easily enraged by threats to their precious rigging, and try to entrap anyone who tampers with the ship's maneuverability with thrown webs before moving in to administer their poison.