Pathfinder 2E: Toxicologist and Poisons

Well...it's a long one. A breakdown of the Toxicologist. Is this a good alchemist? They get the ability to poison weapons as a single action at first level, but is this as good as the assassin, rogue, drow shootist and poisoner? And what can the alchemist do about it? How about an alchemical familiar, will that in combination with sticky poison, be as good as the poison weapon feat? At first level they also get the ability to use their class DC for their poisons made with infused reagents. Is this an important ability? Well, not at early levels, but after level 8, it really starts to be significant. And then they have the level 13 ability to use a double poison. How does this stack up? All this AND we talk about how poisons work, and we end it off with a spreadsheet. Yep, a sweet SPREADY!! As we try and come up with a way to calculate how much damage this poison is really doing.