I did a bit of tensile testing here with various adhesives. These were n = 1 and I’m going to run a few more trials and expand this, but resin welding did fair best in terms of tensile strength.
Process might be important here, and I tend to cure the resin on the joint with a UV laser, and then put the entire part in Form Cure to ensure that it cures all the way through. This also has the advantage of a seamless surface finish and consistent material properties after being post-processed.