different skill stunts

here's a few pics with description of stunts for anyone that is interested and if you have any info about them, feel free to post, cause i know nothing about them
Sewing Stunt

Shipbuilding Stunt

Foundry Stunt

also got a book for poisoning which can be used when at level 60 alchemy, if anyone knows anything about it, or knows anyone who knows anything about it, please do let me know
i want to know if i should use it on my craftsman seeing as he already has alchemy, in the hope he can poison weapons that i can pass on to other players, but it may happen that when a weapon is poison it might only last a very short time, which would be pointless for a craftsman to have the additional stunt
it would be better served on a fighter that can use it during battle, but that means i'd have to buy a stage 2 book for alchemy, which i'd rather not do, so if anyone has the slightest bit of info, please do let me know