Reverse Fjord Rush: Start on the docks, and end at the top of the mountain as the final stage.

Reasoning:
The first stage of rush is the most difficult, and it seems like most of the time, if the attackers can beat the first stage, then the next to are just a formality...they almost always will win.

Reversing Rush has some advantages:

1. It puts the most difficult stage last.
2. It's more dramatic, in that the attackers are fighting for a goal that looms over them for the entire level...the mountain and the radar station in front of them.
3. From a lore perspective, it makes more sense for the attackers to be landing on the docks and fighting toward the radar station as their objective.