Learn to read. I never stated dual spec is a waste.
It's a waste to dual spec, just for one talent just to down phase 1 of one boss, which doesn't even guarantee a kill. Dual specing, for one phase, for one fight is asinine.
Secondly, there is no way any serious raiding rogue would put FoK in their spec. I dare you to post such a suggestion on any serious raiding forum, and link the post here. The only time that is ever suggested is when people are being sarcastic or joking around. This is how a
real combat rogue's PVE spec looks like:
Talent Calculator - World of Warcraft
Lastly, it's ironic you are suggesting I be in a 'top 25' guild before talking strats, as if any of top guilds need special tricks to beat this bos. Please... Thorim phase 1 isn't even hard to begin with. You don't need tricks to beat it. Mass dispel + AOE = a joke fight. The only time it even remotely becomes difficult is hard mode 25m. However... that's phase 2... not phase 1. I mean seriously, what's next... suggesting we start specing prep on some bosses too? Let's get real here.
L2P 'kid', before spreading misinformation.