Script to select next path in the Paths panel and use Insert Path menu item from Actions panel

// select next path;
// 2020, use it at your own risk;
if (app.documents.length > 0) {
var thisPathIndex = selectedPath ();
if (thisPathIndex != null) {
    if (thisPathIndex == activeDocument.pathItems.length) {thisPathIndex = 1}
    else {thisPathIndex++};
    var desc28 = new ActionDescriptor();
        var ref5 = new ActionReference();
        ref5.putIndex( stringIDToTypeID( "path" ), thisPathIndex );
    desc28.putReference( stringIDToTypeID( "null" ), ref5 );
executeAction( stringIDToTypeID( "select" ), desc28, DialogModes.NO );
};
};
////// determine selected path index //////
function selectedPath () {
    try {
    var ref = new ActionReference(); 
    ref.putEnumerated( charIDToTypeID("Path"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") ); 
    var desc = executeActionGet(ref);
    var theIndex = desc.getInteger(stringIDToTypeID("itemIndex"));
    return theIndex
    } catch (e) {return null}
    };