After about an hour of grinding,
goes down!
was probably what made the victory possible, as I think she had the boss paralysed for more than half of the battle... Things were becoming a bit panic-shaped towards the end, when I only had Meiling, Patchy,
, and Marisa (who was in reserve) left and she used Focus to prepare a final party-wipe, but I brought in Marisa and brought her down with good ol' Master Spark before she could actually use the move.
And now to try the 12F boss trio again... Hopefully the new character will help, as she seems to be a bit of a tank.