[GarfieldKlon]

I don't want to write into the calibre folder structure, I just want to export my books somewhere else with my own defined logic.

I think this could be the solution:
sublist(val, start_index, end_index, separator)

edit:
Ok here's something ugly, but it works:
{#genre:subitems(0,1)}/{#genre:subitems(1,2)}/{#genre:subitems(2,3)}/{#genre:subitems(3,4)}/{#genre:subitems(4,5)}/{title}/{title}

I don't know how to dynamically create the folder structure.