My friend, Sophia's bases are not weak at all. It appears she is bad because she is so good. Her bases are so good in fact, that it made her bases look weak. And of course she is weighed down. She is weighed down by her many life experiences and this causes her to be slow because she can not escape her past. If she had amnesia, that would not be a problem.
As for Tartarus, my friend, I brought her there myself and I can guarantee you, she can wreck some major shit.