The Top 10 Zones to learn.
Video Version
Written Links
Act 1: Upper Prison
Act 2: Vaal Ruins | Bonus: Crypt (Easy to Learn)
Act 3: Lunaris Temple 2
Act 4: Belly of the Beast 2
Act 5: Templar / Torched Courts
Act 6: Ridge
Act 7: Vaal City
Act 8: Grain Gate
Act 9: Belly of the Beast
Act 10: Ravaged Square
Basics
Important to note
While Layouts are great at reducing Campaign Time, the biggest Factor is the Basics, as they apply to all Zones, all Layouts, and can even help in the Endgame.