Yumeko is much more easier this time around now that I know her abilities. Misery Doll is the only very dangerous spell since I cannot damage her without Fury, but I just bomb bum rush it.
What I did different this time is actually using Aya/Yukari proper, this is not just for speed. By getting to Yumeko by the end of Turn 2, she never leaves the area she starts on, which means you can use it to fly up, or land to avoid getting Fury'd because of how the AI uses it to go pass Support Defend. Of course, you can just let her come to you (you have land there), but two things, first is WP is on a Turn 7, and two, having less control of the Makai Bugs that way, they were so distracted, they could not even get to me when I finished the Stage in Turn 5.
The only actual way to use reals off this stage is to use a partner with Hide. Yumeko just wipes you if you don't. Landing actually helps too, since the terrain gives 10% Defense up.
EDIT: Murasa is no longer forced to sit out the 2nd Makai Mission. Before it causes the game to softlock, if she was on the ship the stage beforehand. Now the ship is forced to go to Rinnosuke mode instead, and Murasa to be deployed.
I did not deploy Murasa, and now the game is stuck in a softlock trying to play the cutscene in the end...