lolwut? At 20/12-13 with A Ike she has 103 AVO. The most accurate enemy in 3-5 in HM has 157 HIT. That's 54 displayed hit. Okay, so that's about what you said besides the fact that she's 3HKOd. Except that's only one crossbow warrior and everyone hates those guys. The NEXT most accurate unit has 43 displayed hit, but 4HKOs her. After that all the enemies range from lol6-34 displayed HIT on her.
At the same level, she has a 51% chance to proc Adept, 36% to crit w/out adept, and 48.8% to crit w/ adept using a wo dao. She also has 30% vantage.
So against the most accurate unit she has a ~16% chance to die in 3 rounds. Next most accurate has a 3.4% chance to kill her in four rounds. Meanwhile, assuming she 3HKOs them, she has a ~69% to ORKO them. Even w/ worst bio, she has a 30ish% chance to survive three attacks from the crossbow guy while still having a 60ish% chance to ORKO. And even on good bio, nothing has >50 HIT on her. On best, she has a 77% chance to ORKO as well as facing 8.5% chance of death in 3 rounds at worst.
I didn't bother to check true hit, but that would only make her even more durable everywhere except against the crossbow user. And even then, it would only make a significant difference when she's on worst bio.