((Muh, while poison is baaaaad, in theory-if I understand how this game is designed-there will never be a point where you can't avoid it in the first place. This game is based on scarcity, not randomness. From a design point, being poisoned is just a price to pay for failing or dodging a challenge. I'm PRETTY sure that spider was blind back when we fought it...and at the very least, no one should have been attacking it but the armored one...))
Yup, this is exactly it. For whatever reason, as soon you guys saw the spider you had to kill it. It would have been prudent to simply avoid the spider (and you could have done so easily, as it was indeed, blind). Also, poison is poison and bad decisions are bad decisions. Having the gal with no armor charge the spider with huge fangs was a bad decision, hence the poison suddenly becomes relevant. Have the gal
with armor charge the same spider, and poison is no issue.
And yes, there is very little randomness (except for loot, I tend to randomize that somewhat), you will always have some clue of what to expect. And every puzzle will always have enough clues to solve it (and enough clues to tell you what happens if you fail). Some are just more transparent than others.
Anyway, after you make your purchases (is there anyone else that wants/needs to buy something?) you can immediately head out. Since Kala has high Arcanist she can smell/taste her way to the tomb (i.e you don't need to pay a guide this time).