First off, I should mention, a user on nexus RBM page is the reason I learnt this was possible.
That said, here's the steps.


- Download RBM as you normally would.
- Download Vanilla AI sieges for RBM.
- Place them at the bottom of the load order.
- Head over to Steam > Steamapps > Workshop > Content > 261550 > 2859251492 > ModuleData
- Open "RBM_bow_shields.xml" with notepad/notepad++
- Delete everything between <item_holsters> and </item_holsters>
- Save the xml.
- On game start, head to RBM options: Keep only RBM AI enabled, i.e. You want to disable RBM combat and Tournament modules.
- The game should now perform as expected with field battles having RBM AI and the siege AI, which requires complex pathing is handled how shokuho is intended to, without RBM.

For those wondering what the deletion in the xml is for - Shokuho positions quivers and such a bit differently and you don't want RBM messing with it or it looks horrid and breaks certain things.
Have fun!