I haven’t used that stippling program, so I can’t say much about it. Our stippling program has a built-in TSP routine to help reduce air-printing time.
If the Eggbot optimizer is not working, (or if restack does not work) it may mean that your document does not consist of discrete paths. If, for example, your file consists of many points that are all part of the same path or are grouped together, then neither of those optimizations will be able to do anything.
