You have to remember back then DC Comics was real stupid about power sets. Back then Superman could move planets swallow bombs and so on....Like how do you beat that? How does someone who shoots lightning out her hands even compare to that? He can make anything appear on top of you with a blink? You could be on saturn in a blink? Constructing matter? In a flash. Taking atoms and moving an rearranging them in a flash of thought. Element lad created a whole section of universe with a thought. Time, power, there are no limitations to what you can do when you have reality warping powers. It's just basically how stupid your are that limits you.
The Legion of super-heroes is basically the future equivalent of the X-Men you can match up the powers of all the legionnaires with past and future X-Men members