My experience with Mu so far. Imo Tager has slight advantage or its pretty even, i find fighting Lambda and Hazama (and the top 3) much more of a hassle than Mu with Tager. Hakumen destroys her, but i found her harder to catch with Ragna than Lambda cause of her dp and her lasers interrupting your combos, so in my experience she might have a slight advantage vs Ragna. Bang and Lambda are probably the hardest after Hakumen in my experience so far.