It depends. If you are using them for your own use only then remapping the UV is certainly an option. If you plan to distribute them then it's not such a good option. In that case your only choice is to do lots of work with blending. My advice would be to start the pigment actually slightly above the seam (only by 1/2 doz pixils or so) this way it would be hardly noticable (that you started a little higher) but it will be slightly easier to blend.