Here are the common shells for the 10 archetypes as outlined by WotC (at least in the Premier Draft page of MTGA, I couldn't find the list anywhere else! thanks for the screenshot, u/itsnotmyfault). The idea is to find out which of them are the most likely to consistently come together during a draft, as explained in the answer to What's the pool of commons like? of the What's the Pick page.
The archetypes are ranked by power and likelihood to come together in draft - a totally subjective, but hopefully justified view.