Although I mentioned about it previously, I didn't get to post it. With solar drive party, there's actually two maps that allows you for super quick clears.
Chapter 4 with Lycoris: https://streamable.com/w4yce
Chapter 10 with Enotera: https://streamable.com/lzexc
In the event of no stamina cut on aqua shadow or whaleship, the other fast spots I generally get my ampies are either Memory Map of your choice or Scene 1.
Memory maps are 1 battle, and plenty of flexibility depending on which map gimmick you pick.
Scene 1 stamina cost is only 84 when there's stam cut and has more chests than anywhere else. Scene 2 can achieve the same thing but has 3 fights instead of 2.
https://streamable.com/ey5xt