I'm not a ranger myself so i never had this problem myself.
But when i got my new imbued ring with an agility buff, i reminded myself of this old thread.
I always forget to recast the agility buff of the ring (25 minute timer) so i thought this macro might be quite nice to remind myself. unfortunately, i do not know how to cast the agility buff with a command.
/useability might work for combat arts like makeshift weapon, but it doesn't for items. The spell is called "Flare Of Agility" but if i try to /useability it, i get an error message "could not find spellbook entry"
Perhaps i can activate the buff with the proper command for activitating my left or right ring item, but i dont know the proper name?
edit:
Well, i found a command that sounds promising:
/use_equipped_item
But unfortunately it does nothing for me so far.
i tried /use_equipped_item left_ring or left ring or right_ring or right ring. Nothing. Not even an error message.