I am looking at RTW fares, and I want to fly in First for the majority travel, I know first is unavailable on some routes, like internal USA etc, but every-time I use the star booking tool, no matter what I try, its always putting me in Business, for every flight. I assume RTW fares are like discounted first codes, but has anyone ever manages to actually book a RTW fare in First, can certain travel agents help? I want t fly first with Swiss, LH, Singapore, ANA etc

Thanks