My advice is play the build you like until it proves unviable .. simply because a build isn't the theorycafter's FoTM doesn't mean it's obsolete.
Seriously, if the build you have is one you like and if you're still able to progress without any big problems, stick to it.
Like all MMOs, this game is blighted by the theorycrafter's pontificating on the most 'efficient' builds and min/maxing everything in sight. Unless you intend to become an end-game bleeding-edge raider then an extra 1% on TEH BIG NUMBERZ isn't going to make a lot of difference.
i am not yet know what going on on endgame but i able to solo almost anyhting untill now
so iu guess i will stay with staminna sorc build atm