I chose the upgrade to backshot, because I had adept 1 on the other choices already and didn't except to see that much improvment. Backshot I had not been able to upgrade yet and it was still App 1, so I chose that. I went from 150+ damage on my backshots to 220+ damage. Now that's was nice for me. It sure helps. Since I typically can only get that thing of once. I also allows you to do backshot while on the side of your target and not totally behind it. I was using the willowood bow of service, but just got a better one. I can't remember the name. Last I checked I had 37 place on the lucan server for that 220 hit. Character name is Kosmos on Lucan server if you want to look it up. In my case I will always choose the one that I suspect I will see the biggest jump in, since I typically already have the ones I use most upgraded.