My opinion, but not based on a whole lot of evidence or science, so take it as just one person's opinion:
I have cut cuttings into 2 or 3 pieces in the past, but would not do it again. Upon reflection, I can't see how it would increase your chance of getting 1 tree. You're basically weakening each piece when you cut it. Certainly it can work, and you may very well end up with 2 or 3 plants, but in my opinion, each will be weaker than the 1 you would have ended up with otherwise. If you are OK with this, it is great to experiment and you can learn a lot.
Another thing you could try is planting it horizontally, just below the soil. I did this with a cutting last year that was growing roots out of the top and shoots out of the bottom. The cutting did end up being successful, so I can't complain. But I'm not sure it really helped. In the end, the shoot near the bottom of the cutting ended up drying up, and one came out near the top after more roots had formed.
I mean, think about it. The plant tissues are set up for water/nutrients to flow in a certain direction. So you can't really end up with roots above a shoot. And if you do, they won't be feeding it, they will end up pushing a shoot at a node that is higher than them. And when I say "above" and "higher" I mean in terms of the natural orientation, in other words, before it was cut. If you plant a cutting upside down, then it might survive, but at some point the stem will have to make a u-turn.