Guild Wars 2

So, I am no ‘phenomenal player’, but I like to theory craft with GW2 strategies.
I make videos for GW2 and recently I have been wondering a lot about formations and roles in tournaments for sPvP. I made a couple of videos where I theory craft-

*http://www.youtube.com/watch?v=7_ZRSJTkXjY&feature=plcp – sPvP formations
*http://www.youtube.com/watch?v=QZyg2lpeYAY&feature=plcp -Disruption in sPvP

I don’t care if you guys don’t want to watch these videos, they are just examples of the topic I want this thread to be about.
What I want to ask is: what kind of formations do you think would suit tournaments? What I mean by this is if you watch the first link, you’ll see that I discuss how many players should be dpsers, how many should be support and how many should be what I call ‘controllers’. I am wondering what you guys think, and what are the advantages and disadvantages of profession formations.

For example, if we go into a match with 5 dpsers, then we have a large amount of (hopefully) burst, but we also take the risk of leaving our dpsers in the mud a bit with regards to suppourt, both healing and tanking suppourt.

Please tell me your thoughts below.