It takes something like 40 WP runs to fully darklight a job.

We can do that in 40 minutes each (normal pulls) = 1600 minutes which is... 27 hours or we can do it in 20 minutes (easily!) so half the time.

Great groups can do it in less than 15 minutes.

Sure, every once in a while, the tank might die and that sets you back 5 minutes, but it's worth it.

Don't blame the players for wanting a droll task to be faster, and more fun.