Scaling Customer Success

I am currently in the process of a Customer Success and Customer Support reset project. Our products are complex, highly configurable, have a 12-24 month sales cycle and we have an average 2.6-year contract length. We have 10 CSMs globally and a small customer marketing team. While we sell to MM, our focus is on enterprise. I am building my 3-year plan and working my way backward to next year's plan. Does anyone have customer success org charts that show the progression as they scale to 3x? Extra kudos for any suggestions on impactful tech or specific roles that helped achieve this type of scale.