Theoretical Analysis of Bleeding Wound versus Penetrated Armor, both pre-update and post-update(I decided to move this from the isekai Update 91 thread, to avoid cluttering it)
Not sure if we experimentally tested or calculated this before, but I'll begin with a beating down Schoolgirls race. Apparently I once
tested that Schoolgirls have almost the same PMit as Elementals. They don't get chaos upgrades, which makes a big difference. I'll estimate a level 500 Schoolgirl has 66.6% PMit.
PA x1 would do (1 - 50%) / (1 - 66.6%) ≈ 1.5x damage
PA x2 or Imperil would do 2x damage
PA x3 would do 2.5x damage
PA x3 plus Imperil would do 2.75x damage
BW x1 adds 8% adb per turn that ignores mitigation, or 3 * 8% / 2.434 = 0.099x damage per turn, taking into account elemental strikes and averaged crit
BW x5 adds 0.493x damage per turn ≈ 1.5x damage per turn
BW x5 plus Imperil would do 2.493x damage per turn
Conclusion, it is an extremely close contest! Even closer if you consider that Peerless Shortsword of Slaughter warrior has about 4.3%
more adb than Peerless Rapier of Slaughter warrior. And note that is for single targeting a Schoolgirl. If you fought 7 Schoolgirls at once and spreaded them, old BW x1 adds 56% adb that ignores mitigation per spread cycle, thus doing about 1.7x damage, in other words
stronger than Penetrated Armor. And that is without Imperil.
For reference, I redo the above calculation and comparison for normal 80% PMit monsters in the old Persistent version of the game.
PA x1 would do (1 - 60%) / (1 - 80%) = 2x damage
PA x2 or Imperil would do 3x damage
PA x3 would do 4x damage
PA x3 plus Imperil would do 4.5x damage
BW x1 adds 8% adb per turn that ignores mitigation, or 5 * 8% / 2.434 = 0.164x damage per turn, taking into account elemental strikes and averaged crit
BW x5 adds 0.822x damage per turn ≈ 1.8x damage per turn
BW x5 plus Imperil would do 3.822x damage per turn ≈ 4x damage if also adjusting for Shortsword higher adb
That is for single targeting in general. For spread targeting, let's say swarms of 7, old BW gets 7 times stronger, so old BW x1 does about 2.15x damage, which is marginally stronger than Penetrated Armor. And this is not considering Imperil. It should also be noted that Bleeding Wound takes effect 1 turn (or entire spread cycle) earlier than Penetrated Armor, which may do absolutely nothing if it wears off before you come back.
Conclusion, old BW versus old PA was properly balanced. I've always said it has been a misconception that Bleeding Wound was weak, and that it even needed Imperil. In practice, players did find that
1H rapier was faster than shortsword without Imperil usage, but if I recall the tested results were not as different as traditional belief held. (That is the reverse of what I just claimed for spread targeting, so what was the difference? Counter attacks would be my guess. They are only improved by PA).
The tremendously increased 6x power of new isekai BW is still worrisome. Let's revisit the calculations in isekai, starting with schoolgirls:
PA x3 is still 2.5x damage
PA x3 plus Imperil is still 2.75x damage
PA x4 is 3x damage against schoolgirl, when you get fresh proc which may be over half the time at high level
BW x1 adds 50% adb that ignores mitigation, or 3 * 50% / 2.5 = 0.6x damage
BW pseudo-maxed I'll say is 165%, so adds 3 * 165% / 2.5 ≈ 2x damage, 3x total, actual cap is 200% but hard to reach
BW pseudo-maxed plus Imperil is thus 4x damage
Against regular monsters in the new version:
PA x4 is 5x damage
BW x1 adds 50% adb that ignores mitigation, or 5 * 50% / 2.5 ≈ 1x damage, our same prior result, note a more generic crit portion because the system is reworked
BW pseudo-maxed adds 5 * 165% / 2.5 ≈ 3.3x damage, for 4.3x total
BW pseudo-maxed plus Imperil is thus 6.3x damage
We've already said that one stack of new BW grants 2x damage for single-targeting. For spreading, one BW stack adds 50% + 40% + 32% + 25.6% + 20.48% + 16.384% + 13.1072% ≈ 197.57%, which is
5x damage. That's exactly the same as one broken new PA hit. Hmm, I guess that's fair! New BW may have a lead in the Schoolgirl race, but that's where I did the most fudging (the 165% came out of my ass, and there is another mathematical flaw in my general approach).
I still think the following tweaks
might help to balance new BW versus new PA better.
1) Change Imperil to stack additively/subtractively with Penetrated Armor. Currently, PA loses half its normal efficacy when stacked with Imperil.
2) After doing that, perhaps we can lower the first turn PA proc to half mitigation, as Tenboro suggested earlier. As it would still hit 0% PMit when stacked with Imperil.
3) Fiddle with and lower some of BW's 200%/50%/40%/20% numbers to once again try to make PA versus BW perform the same in the 3 major situations: single-targeting Schoolgirls and/or Tower 200 monsters, single-targeting regular monsters, spreading regular monsters (mostly in theory, as in practice rapier will just OHKO everything).
It's fine to forget all that, the balance is decent now, except that PA is ultra bombastic while BW may actually still be stronger. Tenboro (or Nezu) probably have some way to do sandbox simulations against Schoolgirls to get the real answer.