I use two arrows for stump shooting. One has a judo point, which helps keep the arrow from getting lost in the grass or weeds. The other one has a plastic blunt, which provides a little cushion when it hits a rock or hard stump. I find that carbon last much longer than aluminum or wood for stump arrows, so is worth the extra cost. My stump arrows match my regular arrows as much as possible in spine and weight, so I can use my normal gaps, such as they are.
Stump shooting is hard on arrows, but by selecting whichever is best of my two arrows for the shot, I usually manage to make them last more than a year, shooting them at least a dozen times almost every day. I have had stump arrows that I have had to refletch 2-3 times before they get lost or broken.
I shot a stump arrow at something a few months ago, and when I got there I couldn't find the arrow. I hate losing any arrow, but more than hate, this one perplexed me because I couldn't understand why it should be lost. I looked and raked three times on three different days, which is my limit. Then after a few more days I went back to look again, and found it on the ground in plain sight! The only thing I can figure out is that it was stuck up in a tree, and eventually shook loose from the wind or something. The deer have learned to look up; it can't be that hard for us humans to learn to do that too!
If you use carbon shafts, flex them often. A shaft can be fractured and not show it, but it will usually break if you flex it.