Unless you are planning to make a choral score with 4 separate staves, there is no need to write them that way. The current best practice is to write stems up & down directly on 2 vocal staves, the way they will be read.
Unless you are planning to make a choral score with 4 separate staves, there is no need to write them that way. The current best practice is to write stems up & down directly on 2 vocal staves, the way they will be read.