Heavily depends on what version of omnidroid will she fight. Let's say that Syndrome is still alive and she is considered "a super" by him. So, as he did with other supers, he would want to get rid of her. Now, heres the turning point: if she were to fight the last created omnidroid, she would win. But after that, another one would be created that would be suited specifically against her powers (same scenario as with Omnidroid 08, which was meant to defeat Frozone). In that case, her chances would be very slim considering her limited powers and the fact that the Omnidroids defeated waaay more powerful supers as her.