[X] My Assistant

As far as I could tell, all monsters regenerate SP at the exact same percentage rate, so that's probably not the answer. It could still be possible.

In any case, I just did a wild haymaker test and my first guess as to the answer may have been correct. (I already hinted at it above)

I removed my Ability that improves Haste, dropping the improvement of my Haste from 1.5 to the default 1.25, then retested IWBTH both with and without Haste. I got the exact same results as previously, Haste slowed down monster SP regen by a 1.25 factor.

So the answer would seem to be that Haste is partially broken. The Ability that improves Haste, does not improve your speed at all for the purposes of monster MP/SP regen timing. The Ability that improves Haste does work for extending buff/debuff durations.

I don't know for sure that the Ability works for the speed/ticks of your Attacks and enemy Attacks, but I presume it does, or someone would have discovered it by now. Actually now that I think about it, this is not a good assumption. Someone needs to test this. It needs to be tested in a non-1H style, and without any Attack Speed or Casting Speed to mess up the test.

This is creepy because it means there are two timelines for the world. In reality it's probably just bizarre coding. Or maybe the Ability for Haste accidentally affects monsters just as well as yourself.

P.S. - In all these tests that I recently did, I sometimes used Haste on IA and sometimes hardcasted Haste without having it on IA, just to make sure there were no surprises. There were no surprises regarding this, it's always the same.

This morning's tests were helpful.

I tested Scroll of Swiftness (1.6 times boost to action speed and no Ability reliance) and the result was the same as Haste. Enemy SP regen slowed by a 1.25 factor, and there was no observable difference with regular Haste.

I also tested Slow and MagNet (with slowing Ability slotted) and there was no difference to monster SP regen (it took 19 Attacks to fill the SP bar on IWBTH difficulty, it's 1 less Attack because casting Slow/MagNet has a long cast time about equal to 1 Attack).

So everything in my previous post remains confirmed. The additional thing learned is that the 1.25 slowing multiplier to monster MP/SP regen is not because of the Ability being glitched, but rather is probably an intentional mechanism. Apparently a 1.5 times slowing of monster SP regen due to Haste was deemed unfair.

This also means that the Ability improvement to Haste (from 1.25 to 1.5 times action speed) probably works for everything else, such as reducing the number of incoming enemy Attacks relative to each one of your Attacks. Though it wouldn't hurt for someone to confirm it (a script would be ideal for that particular test, and I'm not much of a scripter).

There is another interesting question to test now: How do your Attack Speed and Cast Speed affect monster MP/SP regen? These tests should probably be initially carried out with Haste off. Any mage or DW user would be ideal to perform this. Script is not necessary, just find a random enemy who starts with close to zero SP and count the number of hits it takes to fill his SP bar, like I did.

(note: This investigation is a precursor to something else, but I don't know if I will ever get around to writing about it.)

Although there are still things to investigate above, here's Part 2 of this discussion. I don't know if anyone mentioned this before but TL;DR Banshee weapons are good in the Tower because they will suck out the Spirit of the enemy being targeted. That pesky enemy that you couldn't stick Weaken/Silence on won't be able to use its Spirit attack on you. After more tests, Banshee weapons seem to work as follows:

• Siphon Spirit proc chance works as stated, is not affected by critical hits, and goes up to 30% on a Peerless weapon
• Siphon Spirit proc effect is 0.87% base drain on my Magnificent Rapier, this scales up with player level and equipment quality, like proc duration
• Siphon Spirit proc effect amount does NOT work as stated, in an obvious way
• On my Magnificent Rapier, the log states the amount drained each time is 1~6 SP. It drains as a fixed ratio of what the target monster's currently filled SP is.
• The drain SP written in the log is correct for what is added to your own Spirit bar. Occasionally it's off by 1 SP, so I think actual SP is fractional and rounded in the log.
• I get 1 SP (display log) if the monster has zero SP, all the way to if the monster has a decent amount. I only get 6 SP (display log) if the monster SP is perfectly full.
• The monster loses 2% of its max SP times the number of SP you got. If the log says 6 SP, then the monster loses 12% of its max SP.
• All target monsters seem to be affected the same, regardless of their stats, level, or PL, and including even schoolgirls and Flying Spaghetti Monster.
• Difficulty does not affect any of these Spirit Siphoning amounts
• The amount of damage you do, or activating your own spirit stance, do not affect these Spirit Siphoning amounts
• On IWBTH, siphoning 2 SP is enough to keep a monster's SP bar unchanged that turn. Because it's fractional (?) sometimes 2 SP will let the monster fill slightly.
• On PFUDOR, siphoning 3 SP is enough to keep a monster's SP bar unchanged that turn. Because it's fractional (?) sometimes 3 SP will let the monster fill slightly.
• If your siphon attack is a deathblow, the dead monster will have lost more SP than usual, this is because it won't regenerate its own SP on that turn

I will not say my tests and these results are complete, rigorous, or precisely correct, but perhaps they could be correct to see how it works. I am switching to an Illithid Rapier now. I suspect it will work the same, but because monster MP fills twice as fast and needs half as much to activate (and together with the drain being proportionately less when the monster bar is less full) I think it will not be enough to freeze monsters like Banshee. Even if a monster has already filled its SP bar, all you need is one lucky Banshee strike and you will buy yourself at least two whole turns of no monster Spirit attack.

Just confirming my observations regarding my Illithid weapon before I forget and retire from the season.

• Siphon Magic prof effect is 0.93% base drain on my Legendary Rapier, this scales up with player level and equipment quality
• On my Legendary Rapier, the log states the amount drained each time is 1~8 MP. It drains as a fixed ratio of what the target monster's currently filled MP is.
• My isekai character has about 1530 MP and 1170 SP at around level 350.
• I theorize that the upper maximum of the HP/MP/SP drained could be the stated ~1% percentage times your character's base HP/MP/SP.
• On PFUDOR, even siphoning 8 MP will not reduce a monster's MP bar, it still wants to fill slightly.
• On IWBTH, siphoning 8 MP will reduce a monster's completely filled MP bar just a little.

The performance with MP drain was even slightly worse than the previously hypothesized poor result, for unknown reasons. I probably don't have the general method to calculate the monster HP/MP/SP loss exactly right. We know that they lose an order of magnitude, roughly ten times more than we'd expect. It's amazingly helpful on Banshee weapons to silence monsters, but not enough on Illithid weapons even though it works the same. Vampire weapons might be less laughable than people realize, if the HP drain to monsters is major. This would be difficult to test because we can't see the amount of HP sucked out of monsters' health bars, and we can't trust the log as it only states the HP that we gain.

It's also possible that your other stats might somehow affect the HP/MP/SP loss to monsters. What if proficiencies, Demonic weapons, or your Intelligence and Wisdom stats, increase the damage of Vampire weapons? (similar to the Drain spell)