Ah lolix, must you turn every conversation into an argument? Tenhou was really just pointing out something that we all probably missed.
Adele IS an amazing unit, which if i am perfectly honest, would trade my berna with.
Despite being a black rogue, I almost never use her other than the rare 2nd duelist needed maps. Any unit with a passive team bonus stat is an autokeep for me, i mean most people awaken katie and all she adds is 2% def. (Although if i were you, i'll definitely keep sybilla too because shes one of the few lolis that got through and your name is lolix)
Note: the passive bonus does not need them to be deployed. Just being in the sortie gives the bonus. 10% hp is on the high end. Get a few units with passive bonuses and you got a broken team without even deploying much.
That said, @rama, once you get bashira up, you can handle thursay's Hard mode with no issues. That mode requires you to have one CC-ed archer but thats it. You'll probably want to get adele as your 2 or 3rd AW target. After spica and maybe an easy gold unit.