I just tried an assassins dagger run, but I never got any of the shields that use adjacent shields. Snakes killed me during infinite. This was my build. The shield had two haste from the forge, and the dagger had one rage. The shield gives adjacent weapons plus one damage on use, so that cancels out shield spirit. The two haste gives me practically indefinite block, due to all the structures I have. I really wish I got some of those special shields.