Bring a large pot of salted water to a boil. In small bowl, whisk together fish sauce, miso, oyster sauce, sugar and soy sauce. Set aside.
Add the bok choy to the pot of boiling water and cook for 2 minutes until crisp-tender. Remove to a plate and add the noodles to the water and boil until still firm but pliable, about 5 minutes. Drain and rinse under cold water. Transfer to a bowl and toss with 1 tablespoon of oil. Set aside.
Heat 1 tablespoon oil in a very large nonstick skillet. Add shrimp, sprinkle with a little salt, and cook until just pink throughout, 2 minutes. Remove shrimp to the plate with bok choy.
Add the remaining 1/4 cup oil to the pan and heat until shimmering. Add the garlic and cook, stirring, just for 15 seconds or so (careful not to burn). Add the eggs and cook and scramble slightly for 30 seconds. Add the noodles, toss, and then add the soy sauce mixture and toss again. Cook, without stirring, until the liquid has almost evaporated, about 5 minutes. Stir and flip the noodle mixture once, then cook until lightly browned, about 3 minutes longer. Add the shrimp and bok choy and toss and cook until just heated through. Transfer noodles and shrimp to serving platter or bowl, sprinkle with peanuts and chilies, serve with lime wedges. Enjoy!