I want them to start with something leather-and-armor style, almost Gladiator-like. She has to look like she has come from this exotic land that reflects ancient Greek mythology. Graceful, but strong.
Give her a ribboned leather skirt and a sturdy breastplate. White cape optional for non-battle scenes so she carries some sense of majesty.
Drop the embarrassing bikini-looking outfit.
As we move toward Justice League, she can adopt a sleeker, more in-touch costume kinda like we see with Captain America as he transitions out of WWII times into modern times. When that happens, I'd like to see the pants.
I would start with something more like this, but with a more pronounced, decorative breastplate. (And maybe drop the stars on the shield.)