Globs of Ectoplasm are used for a lot of things. Exotics crafting, as side currency to get ascended acessories (along with laurels), at some “bet” minigames in certain NPCs, in Mystic Forge recipes, etc etc. So yeah, breaking down level 70+ yellows for globs of ectoplasm is usually a good idea, since a single glob is going for 30+ silver on the TP currently.
Well, I’ll tell you what I do. For instance, after a full Meta event in Verdant Brink or Auric Basin, I’ll have lots and lots of blue and green loot. I check what sells for good value in the TP (and sell if it makes sense), and then I’ll throw blues in the forge in 4s (sometimes the result is a green), then throw greens (sometimes the result is a yellow), and, if I’m feeling lucky, I’ll throw yellows there too (because an exotic might come out). I got a good-valued exotic like that once, but since I’m usually low on Globs of Ectoplasm, I’ll usually just sell the high-valued yellows and salvage the rest for globs.
Well, resources do sell well in the TP. Right now, Hard Wood and Seasoned Wood have pretty good value if you want to make a lot of gold.
That said, crafting is very useful. Often, it’s the best way to get exotics with the stats you need. And ascended drops are rare, so crafting is pretty much the only way you’ll get decent ascended gear.
I need to go back into crafting. I would like to try celestial gear on my revenant, and since I’m not into fractals, it seems crafting is the only way for me to ever have that.