FFRK JP - 10th Anniversary Party: Unleashed Soul dungeons (part 2)

This covers the last boss for stage 7 and the extra stage unlocked after defeating it.
The D??? takes a while to beat it and a healer with Last Stand and stock/Regenga will be useful to take the fight to the end.
Used 2 MASBs for stage 7 (X team) and 3 for stage 8 (lightning magic team).