Too be fair, she WAS being saved by sydney and crew. The stasis ray gun froze her solid for a significant time frame leaving her helpless. Had they not run interference she would be in an even more powerful stasis chamber and being evacuated. MAYBE in time maxima would have drained that as well, but it would still have been a problem. Also, vehemence required lateral thinking because he was able to get stronger than maxima and overpower her. So she isnt unbeatable, even on earth. And there is also that one mystery bad guy that fought her to a near draw back in her military days.