Pulling themselves up, Crush has an easy time of it despite his size. Ryk manages to hope a few alleys easily, Spring following spritely. Rikka and Vok have a harder time, almost falling, but Crush and Ryk just manage to catch them. Then, when it looked like Bellegon was going to fall into an untended bird cage, spilling its contents and revealing themselves, he vanished into darkness, only to appear, panting and safe, nearby.
Luckily for the group, the distance of the patrol and the darkness cloaks them, and no one is the wiser.
Rikka, once roofborne, directs the group as best she can. She finds several circuitous routes. The group is almost around the archer when she must pause to reconsider.
[Okay, you are near the archer. You need some way to bypass him. I'll let you figure out if its is stealth, guile, or brute force. Assuming stealth, that'll be another group stealth check + a perception check. Guile has a few options as does brute force.
In order to succeed on that last challenge, Bellegon had to use Ethereal Stride. It is not available until the next short rest (after the challenge).]