I often run the 22 stam but it takes so much time. In my team:
*Galette (too slow, but i don't have many girls at 55 lvl)
*karin (her skill is perfect for this event)
*Lean (event unit)
*Maia (event unit, 2/5, lvl 41)
*Zora (my best card so far, great skill for this event)
*Lumel (event unit, sadly skill only affect 3 enemies)
*Holly (splash attack)
*Keifa (event unit)

So, any suggestion for galette replacement?