best way to update fedora from command line

edit

I was wondering what is the best way to update my fedora os from command line.

1. yum update (safe ?)
2. dnf update (fast but buggy)
3. pkcon update ( no control )

For example as nvidia blob user i always got into trouble with rpmfusion package and kernel version mismatch. ( kernel 3.16.2 for example ) it's maybe due to the fact i misuse the cmdline.

i'm interested in best practices for cmdline.

PS: i'm using now negativo17 repo for nvidia blob.