Clerics need Spiritual Weapon. It's what a cleric does with his bonus action. It lasts 10 turns and does NOT require concentration. Think about that! The WotC design of that spell was intentional and intended to let clerics contribute to combat in a more meaningful way.
It is a staple in TT. I also used it almost every combat in Solasta through 10th level.
It can't be that hard to implement... it was even included in Sword Coast Legends!
Every patch that doesn't include staples like this convince me that the Larian designers don't really understand 5e... but cutscenes are pretty.