alchemists can make tons of gold, but the effort can get old fast.

if you have a capable team, you can do LFR. i allways did 3box teams, so i could easily get into LFRs usually me being there meant that DPS was retardedly good with hunters, or that heals were all also perfect 3x resto shamms or 3x resto duids with some flex gear usually doing 70% - 80% of the total heal between the three... that usually means the raid will go smoothly. you can get a ton of money, more so if you snipe the bonus slots for healers.

fishing is also a possibility, since you can get good fish fishing in open water in MoP. all you have to do is master the skill of parking the toons perfectly. the best way of doing it was to /follow and move around in circles till they all landed pixel perfect. then broadcast a forward tap on all (to cancel /follow), then move the main backpedaling. takes some practice to set the camera right, or you can just use the camera snap. (makes it very easy)

then just start fishing. turn on full 1:1 mouse broadcasting, and use the mouse to click the buoys that move. up to 6 - 7 characters can fish with 100% catch rate, more than that and the buoys will overlap too often leading to missed fish. and since the whole fishing thing gets really busy with all the buoys you won't get bored.

theres no need to change client from your main, since the main can see the buoys moving on the other fishers. fish is kinda crap ofc, since its fresh water. but the number of fish you'll be catching will more than make up for it.

to level fishing go to Dalaran, i have the titanium seal from the fountain on 9 characters... D: apart having 3x legendaries, 3x seals are the crown of geekdom.

another thing is running old dungeons and raids, drop party and walk all characters in the instance. turn on 1:1 broadcasting and have them walk around aggroing everything. get to the end, aoe, loot, walk out.

you can make a few thousand gold in a few minutes by running in circles around TK. just don't aggro the mini phoenixes or they will ruin your run. (warlocks can suicide at the end of the run, when they release they respawn alive near the summoning stone.)

another good place is the faceless grounds near the maw of doom in the twilight highlands, theres a place with a bunch of earthen ring druids being attacked by endless waves of faceless.
1- use warlocks with all the Regen talents
2- spam inmolation on their spawn points
3- use main to run around looting
4- ?????? (make 22slot bags)
5- PROFIT!

i used to make well over 10k/h there, thanks to the over priced 22 slot bags. they nerfed the trogg place in deepholm, but last i checked the faceless were still bugged.

the bug is, they are not supposed to drop loot, but if you make a party, party loot rules kick in and they start dropping loot like crazy. (don't tell anyone D: )

anyway, i havent played wow in a 2 months, so not sure if there's anything new to do.