If you haven't already or if they didn't come like this, the first thing to do in this scenario is switch the thicker pad spacers to be between the pad and the brake arm.
The optimal geometry is such that at the point in the arms' movement where the pads contact the rim, if you were to draw a triangle between the center of the brake pivots and the cable anchor as the points, you'd get either a right triangle or a slightly obtuse angle.
The reason is that the pad faces move in an arch. If you set up the brake like you have it, the pad is hitting the rim only once it's in the downwards part of that arch. This causes a squirmy, indeterminate brake feel, squirming noises, and the tendency for pads to dive off the rim. So you either want more like a rectangle than an A shape, or a slight V shape to give some room for pad wear before you're in the down part of the arch.
Pad spacers are your main tool to correct this. Put the thicker spacers inside and the thin ones outside. You can't always make it perfect, depending on if the post spacing is too wide or the rim too narrow.