When the subject is human perception instead of objective reality, a fully predictive method can’t work well, and you should be adaptive. So, instead of creating a sophisticated plan for how to engage each stakeholder, create a simple one, implement it, see how it works (monitor), and then improve your plan using that information.
Besides trying to understand the effectiveness of our plans, we should also monitor the stakeholders, because their interest and power can change over time, and those changes may require replanning.
It’s also a good idea to have frequent evaluations to measure the overall satisfaction of stakeholders. P3.express has a monthly activity to do this, and it may be a good idea to implement it in other methodologies as well.