To conclude, our updated protocols provide guidelines for preparation of mixed electron-rich and electron-poor, as well as highly electron-deficient diaryliodonium salts that have been challenging to attain by standard methods. We present strategies to overcome some of the identified limitations of our previous protocols such as competing oxidation of the arene substrates, slow oxidation of electrondeficient iodoarenes and achieving couplings with unreactive arylboronic acids. We envision that this update will further enhance the accessibility and applicability of these diverse reagents in organic synthesis.