Either beat this incredibly overpowered and perfectly timed boss without ever taking damage, or lose - those are the ONLY two options to beat this b***h. Have fun hacking just to finish the story, because that is what Ubisoft deems as "fun" and "fair."
dude take the heal ability and bleed blade skill i completed the campaign on realistic with out running through it before she is spose to be hard she s the final boss and dont forget to use the items u find in the lvl like poison mines