I hit 70 almost 3 weeks ago, and im yet to try some dailys. I started Ogrila but got struck with boredom, after the first round of color clicking on each tune.
I tried going to the island, but when i got there, it was like a gankfest (my server is pretty crowded), yet, im still going to try them.

Anyways to the point: Engineering was a pretty gay profession until the gas clouds, and before that, the epic heads. Then it came the rifle for tanks and some hunters, good money making cause of the primal nether.

Gas clouds are a huge profit, but u gotta be patient. The best way to maximize it, is having mining as well. I even dropped down enchanting with almost all formulas available in game (almost made me cry) to put mining, along with engineering. I once made almost 1k gold in one night, from 9pm to 7 am. Is it worth? well if ur low on gold and cant do any quests besides the leveling ones :P