Cone shaped attack zone

What’s the best way to handle a cone shaped attack area that hits all targets within it once? I’m not looking for specific details. Just a general discussion on the topic.

Make a cone in a 3D modelling software like Blender or 3ds Max (they should have a cone as a primitive shape)
Import it into Unity3D and disable Mesh Renderer (better yet remove it).
Use mesh collider cone as a trigger for attack zone

Thanks! That’s exactly what I decided to try. Works nicely.