Hello,
Glad it works for D.Sentence, must confess I do not know much about this either. Done a little hex modification on another game before but apart from that I mostly use what is already known and apply some sort of fuzzy logic like "if the counters are there, then for death sentence I should find this sort of value around there" like you seem to do. Sometimes works, sometimes not... Many here are way more experienced in this stuff.
Congrats for your initiative and trying. Surprised me for the poison thing, I saw in a mod that modifying the 0a (10) hex by 14 (20) is supposed to make the poison Tick 50% slower (not only the first one), so thought that it was simply a time units multiplier. May be more subtle than that.
By the way, at the right (hex number 3b60f7) there is the sleep timer duration, if you put 32 instead of 64 it seems to divide the duration by 2.
For Poison damage, main problem is that in hex files, the same operations seems sometimes written very differently. For example if you look at Sadness (hex 1DDD70), you can see this c0 03 99 b9 0a which stands for damage = damage - 03/10*damage. In other words, maybe you can find an operation containing b9 20 for a division by 32 somewhere. But it could also be like C1 F8 05 (division by 2^5 = 32), hex 01dda47 could be a candidate, but sadly there are MANY candidates (hex 01ddeca is another one for example) as there are many instances for this operations so this could lead to many trial/errors (as modifying these values can sometime totally mess your game so be careful). Would not be much surprised if that's located near these addresses though.
Don't hesitate to put here your researches results, this can help many people.