Enchanting-
Gift enchants sell really well. I sell almost as many gift enchants per day as I do chaos crystal enchants. This is not really tied to garrison though as temporal crystals aren't soulbound.
Jewelcrafting- 640 rings and neck sell ok. Sold a
Taladitverstärker about a week and a half ago so made another one yesterday. Unsure on the demand but if people are buying the jewelry, which isn't used for transmog, they should be interested in the upgrade, I guess.
Inscription- You can make two staves, these sell as well. Haven't tried the wand. Considering making darkmoon cards for the trinkets which definitely sell but haven't really looked into it.
This is basically, do daily cooldown, check garrison 1-2 times a week. I have a ton of ore and herbs so if I ever come across a trader I might ramp up production a bit. This is not a lot of gold but it's very simple and only a couple minutes a day.