Originally Posted by Rupturez

RNG-sama was a bit kind to me, both times I had one of my divisions going top followed by the helper, so my division would tank the pests before wiping on boss, inflicting some initial damage. Sadly my Edelweiss is not exactly in top condition since I started playing 3 days before the event ended, getting me only a lvl 2 skill and equip Edelweiss, but she shines on this map. Everything is weak to hit, so you probably want to max affection and levels on Edelweiss. Her skill hits like a truck on the final boss. Helper squads scale with the highest level character you have, so that's a good reason to get Edelweiss to 60 as well.

Thank you so much for the advice/your experience with the map, I really appreciate it! I actually started ~3 days before Edelweiss event ended too, but I managed to no-life my way to 23 medals in that time so I'm lucky enough to have 5 skill points on her. Good to know she's useful in this map! I guess I'll spend the next 2-3 days upgrading my girls up to the same power as your teams before attempting the map, although I've had terrible luck with RNG lately so I'm a bit worried..