This discussion is taking an odd turn. You repeatedly write me huge texts, picking apart my words and ultimately, directly or indirectly, accusing me of making you waste your time.
I've already said it and will repeat: if you don't like this battle and don't want to spend time on it, I'm ready to give you any hint or even a complete solution for the entire battle.
In general, I strongly recommend adding a general hint about the first turn in the new version of the map; in its current form, it looks... well, I won't repeat myself.
`sod_sp` is definitely highly recommended, as it involves constant discarding and leveling up to 6424, but it's likely that something else is also connected to it.