Most common model glues are stronger than the wood itself. This includes CA, aliphatic, polyU, epoxy. The first trick to a strong joint is the tightness of the fit. The second is penetration into the joint. Here, thin ca excels with balsa. Thicker ca's may fill gaps, but it penetrates less. With ply and spruce, CA penetrates less than aliphatic or epoxy. The glue dries faster than the wicking time. Use no less than 30 minute epoxy and don't use Pica Gluit. Gluit is altered to make its dry time very fast. Selecting the right glue based on its penetration is more important than brand.