They seem to have expected some things, though, see adding pets with aquatic damage (gun and ooze) aswell as a resistant cockroach to stop us from cheesing everything with elementals. Yet, a fact their damage output is low combined with shields not checking for racial damage means this mechanic prevents a lot as you mentioned. The last boss has got an ability to remove basic shields so perhaps that was not in oblivion either… unlike the reactive damage. Also, an ability that forces swap altogether with an ability which prevents from being swapped, including critters? I can't say I like it.
Don't put all your eggs in one basket. It's a lot better to spend your working capital on buying forty items for auction, each with the potential for profit, than to take all your working capital and invest it in that one purple leatherworking recipe that you hope will make you several hundred gold. If that puppy doesn't sell, or doesn't sell for what you want, you've just wasted all your working money, and deprived yourself of a lot of flexibility. Leave speculating on purple items until you have a few thousand gold squirreled away.
For the purposes of testing this strategy, I started on a new server (High Pop), and the results have been very reasonable after only 3 weeks. I spent 3 hours farming ZF, 3 hours farming RFK, and then 1.5 hours average in WC the following 2 weeks. I currently have about 250 items up for sale, and have made an average of 20k per day over 21 days. Thats 420K gold over 3 weeks, for about 9 hours of work.
A cool little pet farm that can take minutes or ages depending on the god of luck.  This spot contains some of the most dense troll spawns in the game, and each has the highest chance to drop the parrot pet thats soo sought after.  On every serve rthis per has  amedian value of about 70,000g so picking one up can be a pretty cool feat.  Like the sprite darter hatchling spot its, a random farming spot that requires alot of RNG to pull off, but if you get it to drop you can make out in spades.  The other drops are miniscule when compared to this spot.

You earn a large rested experience bonus when you log out in this rest areas. This gives you a massive 200-percent bonus to experience gain from most actions (though experience from quests isn’t included). The amount of rested experience you earn increases the longer you’re logged off, and your experience bar will be blue (instead of purple) while you have the bonus.
Once you're level 32 or 33 head back north through the Stonetalon Mountains to Desolace. You will need to go all the way to the South West portion of the zone to get the Horde flightpath you will be able to pick up quest at Kodo Graveyard outpost on your way to the Shadowprey Village Horde area. Do all the quests you can find in those two Horde areas and make sure you are level 36 before we head out to the next zone.
Island expeditions require groups of three players to venture to islands with randomly spawned enemies and piles of AP. The island expedition ends once they collect a certain amount of AP, and they are granted about 300 AP as a reward — unfortunately, players don’t get any of the between 6,000 and 12,000 AP they collect during the expedition. These missions can take anywhere from three to 20 minutes, and never once offer any real challenge or depth.
Nov 10 How to get to the broken isles Hello I am a lvl 100 hunter and I want to go the broken isles. You see after using my character boost,finished my mission on attacking the horde and getting my new bow I wasn't able to go to the broken isles. I heard you were able to get to lvl 110 if you go but I am not able to get there. There are no portals,no ships and no mission's for me to get to. Please tell me a way to get to the broken isles for the allianceTerthelard12 Nov 10
1 of my 3 polymorph tome spots.  This spot requires a high level mage character (the tome will only drop for mages), and can also be done with the potion of luck for a quick boost to profits.  Generally the kurzen monkeys in this spot have the highest chance to drop the Tome of Polymorh: Monkey – and the best part is they drop it often.  Always check your AH before deciding to farm this spot.  If theres not to many, then give it a try.  In the video I actually got more than one to drop.  It's the cheapest of the tomes, and consequentially the easiest to farm.  Again, you MUST be a mage.
Set sail for the previously unmapped isles of Azeroth. Battle in groups of three as you race against cunning rival intruders—or enemy players—to collect the island’s resources. Constantly evolving challenges await as you traverse frozen landscapes near Northrend, open the gates of an abandoned Gilnean castle, navigate a war between elementals and more. Tides of Vengeance adds two new Island Expeditions to the mix and two new random events, as well as updated rewards.
[Expulsom] is obtained primarily from scrapping armors and weapons using the Scrap-o-Matic 1000 (Alliance), or the Shred-Master Mk1 (Horde). These tools work like disenchanting, you can break down any gear obtained that is from the Battle for Azeroth expansion, including dungeon/raid drops, quest rewards, world drops and crafted gear. The Scrapper isn't restricted to specific trade skills. Anyone, even people without a crafting skill can use it. You will mostly get ores, gems, leathers, cloths, and occasionaly you will get one [Expulsom].
I do not recommend going for TBC, although I remember Hellfire peninsula to be decent, everything else is rather slow. Instead go for WotLK, Borean Thundra gets you levelled very fast, and then you can head straight for Icecrown at 67, which is also insanely fast, although admittedly has a few elite quests. You can go to Sholazar Basin alternatively. 2 zones should get you 60-80 no problem.
On my server there's a big shortage of Primal Air. I've tried farming it in the past using supposedly the best spot(s), but it was honestly horrible. After looking at the Wowhead for Primal Air I noticed there's actually a transmute recipe for Primal Water to Air. I will say as a warning that it apparently does have a 1 day CD like a lot of transmutes, so for some people it might not be worth the time. But at least on my server, there's not 1 Primal Air on the AH and I know that it's a constant shortage, so at the moment I could make a lot of profit just doing my daily CD for this after getting the recipe. To get the recipe you do have to be revered with the Cenarion Expedition from TBC, and there's guides on Wowhead for grinding out that rep as well. I'd recommend checking the stock of Primal Air on The Undermine Journal for your server, and if it's relatively low and you have at least 1 alchemist, go for it. It could be a decent way of making a little more passive gold, just transmuting one Primal to another. I'm probably actually gonna start rolling another alchemist at some point, and this discovery has definitely prodded me in that direction as doing this transmute won't interfere with other TBC transmutes, because there aren't default TBC transmutes as far as I'm aware.
Incursions are a new world content activity that are unlocked when one character has unlocked World Quests. This feature is unlocked account-wide meaning that all characters on that account can access Incursions even without being Level 120. This provides for a lucrative experience acquisition method that is available in a similar pattern to what Legion Invasions offered with nearly an entire level earned by completing an Incursion series which involves four World Quests and one mini-scenario at the end. These also grant item level 370 weapons and Azerite armor, so they should be done any time they are up. Incursions follow a similar schedule to Invasions and are available for 20 hours once they are initiated.
I recommend not counting on transmog sells for your monthly gametime. Its a great market, but also pretty random. You have to have the right items posted at the right moment if a player needs a certain item. If this is not the case, of course you will not sell anything to him. There are people making millions of golds a month with transmog. But they are very professional at it and it really takes a lot of time.