Here it is, and sorry for the 10^gogol' th tread about this but I was thinking of something very simple.
All we need is the collaboration of two major ranking sites : wow-progress and world of logs.
If you killed a boss with the 5% buff, your ranking is invalid, I you want to be ranked you have to kill the boss normally.
It's very simple for world of logs to apply this system, and a bit harder for wow-progress without uploading wowcombatlog.txt but i'm sure they can figure a way to do it.
I think that's the fairest solution for ranking issue and that it will still allow weaker guilds to gear up before facing the real encounter.
Anyway it's not by whining on forums that blizzard will go against their nerfing policy, but if they see a mobilization of the raiding communauty, they might think it's not a good idea for the next tier (hopefully)
What do you think about this idea ?
How can we ask these sites to work on this ?