The e/s colors will vary by person, but I think we can all agree on staples such as Carbon, Shroom/Arena/Rice Paper [or whatever high light suits the individual, a few neutrals like Woodwinked/Sable/Bronze and some matte shades like Swiss Chocolate/Espresso, some plums/purples like Plum Dressing/Hepcat/Nocturnelle, and some fun colors like Fresh Water, Humid, Bitter, Chrome Yellow, Orange, Solar White, Post Haste.
As far as brushes go, it depends on the individual, their tastes, and their features. I'm going to recommend the 252 for packing on color, and the 217 for application and blending.