A Question About Shield Slam

Hello, I was experimenting with this spell and feel a little confused on the optimal way to use this spell. So I understand what the spell does and that I need a shield equipped when using but what does the rotation look like when using this spell? I was mostly trying fierce berserk -> shield slam -> front sweep, but I also tried fierce berserk -> front sweep -> shield slam. Are either of those correct or am I misusing this spell entirely? I am hoping to use this to push harder spawns or for harder boss fights. Thanks!