That's great! Good thing I'm not alone with that implemented mechanic and that people actually think that formula is boring. I actually have a select few skills that sorta follow the formula but there are differences.
The starter spell for my Hunter, Silver Bullet, does Physical Holy damage. It's a reliable alternative for your basic attack and it's also good against undead and evil creatures.
These spells I am going to make in the future but they're basically a sort of upgrade for Silver Bullet. Golden Bullet does pathetic damage to normal enemies but does insane damage to evil enemies. And then the direct upgrade, Divine Bullet, does more damage than Silver Bullet but its more expensive in mana cost and has lesser accuracy. It also doesn't crit unlike Silver Bullet. I bet this could at least give the players a late game option while also not making them the "3 spells with the same name and function but each stronger than the former" formula. Cuz in my games, I want the players to not forget Silver Bullet and for them to make it their go-to undead-slaying tool.