You can use AHK, as it's easier to set up and more customizable than mousekeys. I'll show you the script I use. You can customize the buttons to whatever you like.
Set the feathers/dart tips on the first slot of your inventory, then have the second item on the 5th slot.
1::click left
2::Mousemove, 0, 40, 0, Rel
3::click left
4:: Mousemove, 0, -40, 0, Rel
return