The signal flow you have outlined will work. However, to determine the best place for your H9, you have to decide what effects you’ll be using it for. If it’s mainly delays and reverbs, I recommend placing it at the end of the signal chain based on common effect order guidelines. If you’ll be using it for modulation, it may work better where you have it.
Once you become more familiar with the H9, you may want to experiment with PRE/POST routing mode, which will allow you to place your H9 before or after an effect chain based on how you connect it. Each preset can either be saved as PRE (before an effects chain) or POST (after an effects chain). Watch this video for ideas: https://youtu.be/46_-T7emyjw?feature=shared
