Ashari,
Obviously this depends on the sort of items you 'hoard' in your stash. First of all, always make sure that the items are not better to be sold on the market.
In terms of route, a starting city could've been usefull, but in it's absence I'll start in Ab'dendriel. Take the boat to Edron - Cormaya - Steamship to Farmine - (If needed Carpet to Kaz) - Carpet to Darashia - either run to Ankrahmun or 180 back to Darashia depending on which Djinn. From Darashia you could go multiple ways, same for Ankh. Just ensure the final city you might need has a direct route back to Ab'dendriel.
I'd say: Start with sorting stash by NPC, make a list of cities you feel worth visiting based on this. Then mapping out a route should be much easier.
Asha thrazi.