A ritual is essentially a character reset and only needs to be done once on your journey. You can go all the way to Zone 10 naturally (pop that achievement and others along the way) and then do the "reset" as this is the best path to a quick completion.
To perform the Ritual, you will also need 10 candles so it's not available until you have killed the first few champions anyway (enemies with a star above their head who drop them upon death).
You can then use
to to access the in game menu. Go to the ritual section and choose to perform one. You will reset back to Zone 1 and the achievement will pop!