This particular Method requires that you have a lv80 with 450 Mining and at least 305 Engineering. Epic Flying and Cold Weather Flying is also helpful.

Right now on my server the price of Saronite Ore is 20g a stack while Eternal Fire's sell for about 20g each. I consistently make about 2500g a day by spending about 4 hours circling Sholozar Basin and mining the Saronite and sucking up any clouds I find. Yeah it's not super money and it's a pain to farm that long, but it's 2500g that you probably wouldn't have made in 4 hours before that.