Ok i also tried some VS Mode Challenge too and i only finished one ^^
I made Davis vs 7 Crazy.
Dennis VS 7 crazy... i gave up for now. I don't wanna hope for dva bug.
I also have an old Deep,Woody and Rudolf VS 7 Crazy recording. Then i have a Dennis VS 2 Julians because someone told me with Dennis it's hardest :P .For the others i won't upload for now bec not in the mood for trying them vs 7 crazy now^^.
For the rest i don't know what to try so i won't add something here too.
Btw there is a mistake in your table because you noticed twice vs 5 Julians one time with 12 and one time with 15 pts. And honestly i don't think that also you believe that someone can beat even 5 Julians in HK on crazy with random char.. . So i would give more points for that and delete 5,6 and 7 Julians^^. and with the firzens it's quiete the same. I would give you 100 Points if you beat 7 Firzens without >2000 dmg bug.
Actually i also found a Woody VS 3 Firzen too -> added
Here the Links:
Davis VS 7
Rudolf VS 7
Unfortunly my Deep and Woody vs 7 is on my Laptop so i can only add the another time and my fights vs 3 Julians with Dennis 2 Julians with deep and dennis and Woody vs 3 Firzens were on difficult
But they were made in a challenge i made in our forum, where you were supposed to fight in battle Mode and find your own enemies. Every enemie had his amount of points he was worth and the one with the most Points won. You can also add something like this here if you're interested. It was like around 25 points for a random char and bandit one point and LouisEX 39 and one Julian 100, 2 julians 150 and so on. I have all the numbers still and i can send them to you but ofc they are not the best and can still be reworked