I don't know what's the optimal way to maximize GPH, but I have some mage friends who told me they basically combine these two methods to gold wow classic farm an absurd amount of gold as you can do a similar pull to the one in the second video with almost no consumables if you use two mages. There are also several chest spots that can contain Recipe: Transmute Undeath to Water which bumps up the GPH by a bit if you know how to catch them consistently.

I have never done this myself though as I play a rogue, so I can't give you any further instructions on how to do it, only what my friends told me.

I mentioned Winter Squid but wasn't keeping track of prices recently, 80s for one is alot and will bring more GPH than the 20-40GPH I gave in my comment, should be near 60GPH, you are right on that.

Solo 25-40GPH probably depending on which part of SM you are doing. If you are boosting people you can get anywhere from 60-100GPH depending on how you set the price for the boost and if you can get a full group of people who pay together.

You can obviously boost with other classes as well, but it can be slower/harder to get people to pay a good price and it's hard in general to get enough customers to always fill your group (depends on your server as well) so I didn't include boost runs in my first comment.

How can a shaman farm DME and Maraudon? Or what Do you farm? As far as I know, many things there are nature immun/resistent.

Wow this was an old post to get a notification on haha. Maraudon farm is Princess, Tinkerer, and ghost mushrooms. You kill Princess with Searing Totem and Flame Shock.DME solo is kinda like the Mage and Warlock solo. You kill the Satyr boss, then you take last boss to 50%, evade the imps at a safe spot until it all resets, then invis potion into the cave for the veins.

Enter with the portal. I did Tinkerer and  Princess just fine with Resto gear because the totem and flame shock have terrible spell power coefficients. I personally found it easier to be able to heal up more easily when I actually did get hit. Your milage may vary! I couldn't find a way to kill the croc with waterwalking but I imagine it actually is possible... Maybe with improved ghost wolf?

150-200gph from warlock solo DM runs? That’s the most I’ve heard from any class specific goldfarming. If I’m leveling a goldmaking alt, should I consider warlock over mage?

Or will mages eventually be the most efficient goldfarmers in later phases? I know nothing is certain right now. Just based off of what we know will come in future phases After reading some comments, I have to say that my numbers aren't very accurate. I did most of it using estimates and doing some napkin math.After fact checking the numbers, the warlock DM:E solo jumpruns are probably closer to 100-150GPH and the Hunter solo DM:N tribute runs are at 100-150GPH as well.

I have heard of a mage ZG solo farm that was available on private servers, but might not be possible in Blizzard's classic wow. Assuming it's not possible, warlocks and hunters can get Classic WoW Goblins better GPH than mages usually, but I still think you should play what's the most fun for you so don't disregard that aspect. The biggest difference I guess is that hunter has the least options in terms of goldfarming (DM:N beats anything else by far), with mage having the most options (meaning you can adapt and farm specific items easier that are spiking in price at certain times) and warlock being somewhere inbetween.