There's no working, effective, efficient method of making junk. If you want to know how people get millions in junk, it's because they merch. Every method, dragon fire arrows, broodoo shields, etc. is crap because you turn like 9m gp into 10m junk, which costs $1.50-$2.00 to sell, and by that point, you might as well have just bought 1m from a gold seller for less than that
Don't see why Morrigan javelins are junk...I've seen someone test them out in clan wars. They fucking own. The common junk items are unstrung bows, broodo sheilds, fire arrows. Those usually require a lot of work. You could try the FEI method, find any item (crashing, junk,etc) on the GE. Buy for min and trade it for mid to the character you want the money on.
give granite maces a few more days, then you can use them and lose minimum money, since they are going to hit their original price before they were being manipulated soon.