Pathfinder between levels

Hi all

I stuck on logic to make pathfinder work between levels.

If Im on 3-d floor and target on tenth how can I find a right way?

I have a pathfinder work on each level fine. It is point based levels with joins between point. each floor has points numbers starting from 1 (n1,n2,n3…)

On each level I have 2 or 3 points entrance: stairs and elevators.

Is anyone get something like this working?