Otherwise, its a pretty lackluster expansion profession-wise as there are no useful sellable gear besides Inscription trinkets. Legion had good and variety stat gear across all professions (JC could make BiS socket-rings, now JC is the worst proff ever, so sad). I hope they change stuff soon but I'm not optimistic about it. You should probably level Pandaria Engineering and Alchemy as much as you can on your characters and invest in Ghost Iron Bar/Trillium Bar transmutes to either sell Living Steel or hold them to craft Sky Golem (30-40k profit each char per month). It's hard to maintain a steady flow of GIB/TB though. I "only" have 6 engineers and my stock drys up pretty quickly.
I’ve been trying out engineering with a character I boosted from 70 to 100. When making stuff to sell on the AH as an Engineer, how do you do it efficiently? I’ve been told gathering the parts on your own takes too much time (like mining all the ores you need), but I don’t have an influx of gold to buy whatever I want off of the AH (example being Living Steel. Wanted to make one for myself until I saw how ridiculous the process to make them is and how expensive they are)
Making gold = work, people just want to be lazy and cash in but today a lot of people use TSM, have access to this reddit, youtube guides, etc. More and more people play wow to make gold so ofc the AH work gets harder, you just need to find your niche, i'm making gold with Tailoring from MoP and Cata for transmogs, not a lot of work to farm maths and i sell each piece around 10k, 7 pieces per week and i'm fine for a month.
"The way the glyph market works on most realms is that there are a couple of people willing to put in the long hours who will have every available glyph posted profitably, and undercut within minutes of being undercut. They all reduce the price very minimally when undercutting, and the "competition" isn't about price, it's about who can relist more frequently.
The thing I liked best about the wide shuffle of those days was that it made ALL of my alts feel valuable. I'd get some ore some was sent to the miner to be smelted and then on to the blacksmith for belt buckles. The rest went to the jewelcrafter to prospect. Some of those got cut, the rest got turned into jewelry that was either sold or disenchanted. The enchanter then converted those mats into scrolls. Meanwhile the army of alchemists transmuted that expansion's elemental material (volatiles, sorcerous, etc). It felt like a whole business operation.
Azerite equipment is currently balanced around being able to unlock the outermost, earliest tier of power immediately upon acquisition, while delaying further advancement until the Heart has been further empowered. For example, the first piece of Azerite equipment, gained shortly after the Heart itself, is fully empowered once the Heart of Azeroth has reached level 3. A character at 120 (the maximum for the expansion) may find a piece whose first tier requires the Heart to have grown to level 12 or greater.
There's a few profession crafted pets in BfA on the horizon - Battle for Azeroth Tailoring is getting a Hot Air Balloon style pet, and BfA Alchemy looks to be getting a brand new Transmute Meat to Pet. There are some mount buff consumables from both BfA Leatherworking in the form of a mount barding, and Blacksmithing in Battle for Azeroth will be able to craft Stirrups and Hoofplates to increase mount speed and allow you to interact with things while mounted.