Customer segmentation in a land and expand model

I'm a Director of Customer Success and I'm exploring the idea of customer segmentation in 2022 given our rapid growth. Right now I'm exploring ~3 segments: low, medium, high touch with customers. We have a "land and expand" model and at a high level: pricing is based on product usage. My leaning is to put both enterprise customers AND customers that have high potential to expand to enterprise level in the same segment since I imagine they'd require the same level of high touch support. My leaning is to vet this based on current size of the opp + current size of any expansion opps (Example/fake numbers: Anything that is $100K+ current opp and/or $100K+ expansion opps are put into enterprise level support). 

My question to the community: What criteria/data do you use to segment your customer base in a land-and-expand model?