Board Thread:General Discussion/@comment-33435753-20180119220946/@comment-32271305-20180119231535

The bottom right path is always the best one, it gives by far the best boost and it's also the one with the highest number of shiny stars to unlock, but it can only be maxed out if the unit is SA10. If you're sure that you're never going to raise his SA, go top left, which is the second best path to take. But in this case, it seems like a unit worth getting to SA10.

Top right is the third best, and bottom left is the last one.