Lol i start the map with Spica + Soma, they can manage to DPS just well, then prince
place 2 healers on bottom central (alissa + iris)
Then to tank i use Leeanne on top spot, Maribel on bottom spot, replace both archers for a healer and a mage, and add another mage to kill more quickly; i use maribel's skill just as her HP drops around 10%, along with iris + alissa skill
easy map once i figured it out

maribel may me overkill with her skill, a bernice should sufice i think, might try it out myself later today (waiting for CHA to refill)