Annabelle teaches alchemy lvl 4 from BF Act 2-4. In case you bought it... well, there are books giving this skill, BUT: the book skill is always lvl 2. So, if you bought lvl 4 and didn't max it out - then got the book, your lvl cap was reduced to 2 again.
Teacher list exists =>
Desdemona has made a wonderful one. Please, look for her page. I'm at work and can't open several windows at the same time.
http://studwww.ugent.be/~kvloeber/BD/TA.htmlhere is her page - it's really awesome <img src="/ubbthreads/images/graemlins/up.gif" alt="" />
Trade => I didn't invest in this skill. Pickpocket was nicer - steal the money/potions etc. instead of trading.... You are allowed to haggle for a lower proce, this was too strenuous for me.
Wisdom => I think, you only get 1-2 lvls higher - and only the char with this skill has the advantage. I didn't invest in it.
Durancy => didn't invest into it. Spells were powerful enough in my case. It doesn't cost additional mana IIRC.
Had an archer/survivor/mage => she had 80 strength, so she could carry heavy armour. Did that with gold charms.