I remember! having this exact problem on the first game I made at school, and I ended up creating a unique object & class for each enemy in my platform levels because at least it Got The Job Done.
Conceptually, you want multiple instances of your archetypal fighter, each spawned identically and running the same package of code. I don’t know Construct but generally you’ll be using the editor to define an archetype or prefab, and then at runtime spawn them into the world when needed.