Expenses Approval Routing where levels are inconsistent

Summary:

We are setting up expenses. There are 7 job level approvals but not every user follows the same number of levels for a given expense report amount. We want to know how to create serial rules to allow this - if possible

Content (required):

Example (Simple)

User Approver1 250 Approver2 500 Approver3 1000 Approver 4 Unlimtd

UserA NA Job2 Job3 Job4

UserB NA NA NA Job4

UserC Job1 Job2 Job3 Job4

So an expense report for UserA for 499 goes to their supervisor 1 level up who has Job2 assigned (Up to 500).

An expense report for UserB for 499 goes to their supervisor 1 level up who has Job4 assigned (Unlimited).