Why not use a list of nodes? A Graph DB is a very versatile type of DB. You can manipulate it in several ways(just need to be creative and learn DQL very well) for example this How to store ordered data? - #4 by MichelDiz - what I was explaining there is a kind of “linked list type”. Very common in several languages and algorithms.
The list type is a simple set/compound of scalar(int, string and so on). You can’t have duplicates in there. But with edges you can have the array logic.