So going from the the team/game I posted the epic day 10 battle earlier I pushed through to day 31. Ended with 240 EE with Empathy and Antipathy still left to buy. Here's the team, thoroughly broken:
I'm guessing 9.22E is the maximum value since it wouldn't go higher than that. Only Freedom is not hitting that cap. But to be honest I wasn't even remembering to max it out in the end. And with another 25 turns to go until the final battle is supposed to happen I think I'm in pretty good shape.
On my way there I squeezed 36 EE out of that glorious day 10 and exploded forward from there. Going from a single 3 turn commander one day to a 4 turn, 2 capture, defiler the next. Things progressed rapidly. I wanted to leave some friendships in there this time so I went to push PAIN across the board. The plan was to get Confidence to break first since the trauma requirements escalate for each subsequent vulnerability.
Turned out it didn't really matter as right after I trigger an epic orgy which already pushed Fortunes and Vanillas traumas to the max. Iirc this was still before the day 15 interview. I definitely broke the confidence before but I'm not 100% sure about the orgy.
Afterwards it slowed down considerably. With all the final actions available to every chosen my effectiveness was significantly reduced. I got the Drain effectiveness to 1000% on everyone on day 24. Some others were already above 1000% and some slightly lower at ~900%. So I went for 4 triple total vulnerability breaks in succession. Confidence first as that was the initial goal. Dignity was maxed out on everyone so that one next. Morality had one of them on 980% but getting a single Slaughter in before the capture was easy enough. Unfortunately Fortune only had 940% on Innocence and while I did go up to 1000%, by that time the Slaughter levels were so high that she instantly detonated upon capture thus not triggering the break. Too bad. She fell a turn later.
I didn't really optimize past day 16 though. Looking back it would probably be better not to push every trauma on everyone thus limiting their actions. Leaving at least one unable to Detonate means you'll need to pay for 4 captures to get 3 instead of paying for 5. Slaughter greatly reduces your surrounds. These 2 feel significantly stronger than Fantasize and Striptease!
While I haven't tested it it looks like it should be possible to limit unresolved FEAR so they'll never use Slaughter. Keep one from Detonating to still get relatively cheap 3 captures (You're only on a 45 EE income at this point, 20 for the 5th capture is a lot). Drive up SHAM and DISG. Then in the battles keep them surrounded/captured as much as possible in the beginning and drive up trauma for openings. Then finally at 100% Extermination run 3 long single surrounds, giving the other 2 free chosen as much time to Fantasize and Strip as possible.
It feels like one of the actions should increase their defense although I'm not sure how that would feel thematically. Lowering openings would also work although from my understanding reducing trauma mid battle isn't a thing that's supposed to happen.
The other big question-mark with this strategy is if this tactic delays the final Morality Break for too long. Since you'll only be unlocking Slaughter earliest when each chosen has had a Total Vulnerability Break. Also If you want to do Major before Minor breaks you might need to unlock Slaughter on the one with Major Morality. Unless she's the one with a second Major I guess. You can still break her Significant Vulnerability to get the EE increase though.
I also ran into a more severe bug: During one of the final Total Vuln Break battles when I went to Examine one heroine It just printed the first 2 line and then stopped and "froze". The buttons at the bottom not doing anything anymore. Had to cloase the game and reload a save.
This had been late in the fight with lots of examining to see if the vulnerability was at 1000% yet. Is it possible there's a kind of character/line limit of the "console" I might have hit? Just a guess. Could be something totally different. It did not happen again so far.