I think a cool raid idea would be a breach at the wall. You could have a huge walker/tank that's interactive, like a scarab for the first part. Guardians have to scale it and dismantle something inside to slow it down. Maybe plant a bomb or something. Then have it like the black spindle mission were you have to retreat to the wall because the cannon blew a hole and adds are overwhelming. This is where you could have the first jumping puzzle. You have to scale the wall while parts of it sare crumbling. To add some variety to the puzzles, you could have a part where guardians have to shoot a huge cannon at another tank. A guardian or two to load it, one to aim it, another to shoot it. The rest have to hold off adds and minibosses. It would require teamwork. Then you could have a section were so many civilians have to escape. Even throw in a special civilian that goes and finds a chest, and people have to go one at a time to get. Just to switch it up a bit from bosses. You could even make a couple guardians drive the escape ships. One controlling guns, the other driving.