[I] demonstrating the highest conductivity within their respective cation families. The relative ion dissociation concept provided a clear explanation for ion mobility and thus, the overall ionic conductivity across the entire concentration range, from dilute solutions to neat RTILs. This behavior can be attributed to the interplay between free ions and viscous forces, which impact ion diffusion and ultimately affect ionic conductivity. Importantly, relative ion dissociation emerged here as a crucial parameter for characterizing ion dissociation in RTIL and molecular solvent mixtures. Our findings also identified [EMIM][DCA] as the RTIL with the highest conductivity (3.442 S/m) at a mole fraction of 0.6 within the RTIL-EG mixture. This optimized mixture offers superior conductivity and requires less energy for CO2 absorption through the migration-assisted moisture gradient (MAMG) process compared to IL-free solutions. Additionally, we introduced a fully automated high-throughput system for efficiently measuring the conductivity, further enhancing the significance and applicability of our study. This automated high-throughput configuration represents a pioneering approach for the rapid screening of RTILs, particularly in applications where ionic conductivity plays a critical role in performance evaluation and selection.