It sounds weird to me but I do believe that there’s no wrong or right way to execute the design process. I’m curious how much does it cost to define personas and user journeys after delivering lo-fi and/or hi-fi deliverables.
I will give you my opinion from two angles:
1 - From a pure design perspective, due to your code skills, I would go for the HTML option. Maybe it will be expensive, in terms of time and effort, but it will allow you to be more responsive to the changes. One pain point, IMO, for this option is about the feedback collection, especially during the iterations with your stakeholders
2 - From a product management perspective, if you want to onboard and to engage your stakeholders a clickable prototype made with tools such Balsamiq/Sketch+InVision could be the right one. This option could be cheaper, in terms of time and effort, but the pace of the updates could be slower than the HTML one
Good luck with it!