Some comments:

1. I assume you'll be crediting this to QFF.

2. I don't think there're enough flights in pure first class. You can buy a DONE4 and get most of the same seats.

3. During your 'break', I assume you're buying a separate for LAX-BNE-LAX? Unless I've misunderstood, I don't think you can break it by going back to BNE. You must travel in one direction with these tickets.

4. Regarding stops in Europe, are you after miles and status credits? I may be wrong here, but I think if there is no first class in a flight, your ticket will be in D. So some good destinations are MCT, HEL, DXB and CAI.

5. For domestic US flights, some of them will be ticketed in A when you buy a DONE if they don't have a real first class, but you don't have that many domestic US flights anyway, so it doesn't really matter.

6. I assume the places you've listed so far are those that you want/need to visit, as a lot of them are just rather short flights.