GW2 has endless synergy and depth among organized parties, but the build diversity in the game is so high that you won't be able to find 'the best build' online. Also, the tools to do serious number crunching aren't provided. People just love to have their hand held and are too lazy to figure it out for themselves.
If you think that it's as one dimensional as you say it is, then i implore you to go and try higher level fractals (13+). Or even a round of explorables without having to repair once; with 5 people who have unorganized, sloppy builds and run around in circles auto attacking with their ranged weapon. I'm sure you'll be equally successful.