Are you referring to the IWC as is currently known, i.e., the combination of 1800 (OCEANO), 1810 (CW), 1820 (IP), 1830 (INTEL), and 1840 (CWE) designators? Or are you referring to the previous IWC, now known as the Cryptologic Warfare Community (CWC) - 1810's?
Either way, I want to stress that the importance of things like order of desired designators is going to vary based on board members. However, it's highly unlikely that it would outweigh a stellar application, sustained superior performance (SSP), and ideal candidate background/education.