not sure if this is what you meant and apologies if it is but when you have favorites set up you can hot key 2 things by holding down left or right on the d-pad so in your case a bow and a sword and while you have the hotkeyed sword equiped equip a sheild and those two will always equip together when you chose the hotkey for your sword unless you change it, thus you can quickly change between a bow and arrow and sword and shield fighting styles
If you have a bow or anything 2h and you clicked your favrioted 1h weapon a sheild will auto go in your left hand as long as thats the last thing u used with 1h