Erothin seems to have every skill somewhere, so that's where I found my first alchemy trainer. I saw a German mod that will get rid of useless spells but I couldn't read the installation instructions and I'm not Wyre Bash proficient. I wonder if COBL works with Nehrim...
I still haven't found the person that sells the portal spell to Stonefield, so I'd love to know who/where to acquire that spell. I might have asked this elsewhere though, so I'll gook around more on the forum.