For the tilted hinge, I do that regularly on leaning trees and limbs. I don't go by the rule "horizontal cuts", but by "perpendicular to the grain". No need to compensate the aiming with the lean. Aim where you want it, tilt the cut with the same amount of the side lean. Assuming a good hinging wood of course, the trajectory is an arc tilted away from the vertical plan. I visualise it by tilting my head. Note, if the ground is sloped, the tree will land before or after the aim. The tilted head helps to see that.
I use it to shift tops where they don't want to go, in this case in exagerating the tilt. It shifts quicker with a shorter radius. I can get a bit much more move like that with the poorly hinging tops. Don't expect miracles though.