Here are the common shells for the 10 archetypes (5 archetypes with 3 colours and 5 with 2 colours) as outlined by WotC (either with the families or with the "signature" uncommons). 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.