Is there a list anywhere that shows what crafting skills benefit from the existence of other skills?
For example carpentry and...??? etc etc
I'm guessing you mean like Smith and Tailor with the Arms lore bonus? I'm not sure about a list but Mariah probably will know. There is probably info on the page for each individual skill. Off the top of my head There is inscription and magery. The higher the magery, the more stats you can get on the spellbooks. (Up to 3 I believe.) Magery also is needed to make a few carpentry items like the pentagram. You will also need 40 music to make instruments with carpentry. I found a +20 ring and bracelet I wear to get the skill points.
Tinkering is a must for all Crafting and any skill that requires a tool/kit to make something Scribe, Cook, Alchemy,