That probaby wouldn't happen in my game. Enemy casters last 4 or 5 rounds, tops. I bring the hurt, every time. If I have resorted to a cantrip with a NPC mage, I have [redacted] it up badly.Fair enough. So how would you respond to a player who asked why all the other wizards only ever seem to use Arcane Burst and not any of the other cantrips? And why is Arcane Burst not something they can pick as an option from the book but I’d rather something you will require them to figure out in-game?
But to be less elusive: NPOCs and PCs are different. That is the way it is.