We Need More Writers!
Check out this great post showcasing the different options you have for crafting ascended armor. You can make quite a bit of gold right now crafting! So get leveled up fast if you haven't already and start printing gold for yourself.
I you'd like to speculate... take a look at the following items, all of which I definitely called on the forums or this blog in the past!
Bolt of Damask
Glob of Ectoplasm (buy orders on the rise)
Unidentified Dye - This will continue to rise in price as long as ArenaNet continues to add new dyes and new content. It's a staple and a great indicator of the economy.
Pristine Toxic Spore Sample