The opening post of this OOC breaks down the stat system and also gives examples. Basic addition and subtractions skills are all that's needed. Check out the IC for some examples of them in-combat as well as the character tab for some of the stat cards I made for everyone. 

https://www.roleplayerguild.com/topics/155411-the-legion-of-superheroes-return/ooc

Also if there's more than one person thinking about this spot, I'd likely have to put up a Character Sheet model to give everybody an equal opportunity. LMK if there's any questions about the stats!