Enter the MC and IC crucial elements.
While at the macro level the IC represents a huge paradigm shift by comparison to the MC – an internal approach v. an external approach, or vice versa – the crucial element provides the specific connective tissue at the element level. The MC Throughline and the IC throughline provide contrasts in perspective (“You and I are just alike,” “No, we’re nothing alike!”), the crucial elements provide direct, oppositional approaches within the OS.
If you wish to illustrate a direct conflict between the IC and MC, use the crucial elements. For example, in The Godfather, Michael represents logic, whereas his wife Kaye represents feeling. In The Graduate, Ben represents pursue while Mrs. Robinson represents avoid (prevent – “My daughter is off limits”).