how to ignore top approver in the approval routing: Job level hierarchy

Summary:

Dears,
kindly advise regarding the AP approval workflow,

requirement is:
users from different departments will be assigned to a create an AP invoice and then it should go though approval route as below:

1) invoice should go to the manager of the user
2) goes to 2 employees in finance department
3) then goes to specif user (X) in the fiance team

So, My concern is
Top approver in the fist stage is required, and i don't need a top approver, is there any idea of how to skip it?

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