Quoted for truth.
Icy Veins is literally there for someone whose never played the spec, it will give you a guideline on what talents to choose and what stat priority to build for, will give you generalized reasons why each choice is good or bad. And lets you do with it what you will.
After that though, its up to YOU and ONLY YOU to do your research and find out what is better than Icy Veins' guide. Using discords and asking around is generally better to find better builds, and simcrafting is 100% the way to do to get more optimal gear choices.