Well, it seems as if I won't be able to maintain a regular supply of Amb for the Unity community as one of the essential ingredients looks to be very scarce now.
Yep, Essence of Blight. It's only available as bonus drops from Blighted resources, which are now incredibly rare. I know of one site, Tazoon crater, that has blighted sandstone, and hear there's another site around.
Admittedly, I haven't gotten my miner alt quite high enough to try and mine this blighted stuff yet, but, going on pre-merge drop rates, it's going to be painful to get any decent quantities of this stuff, to say the least.
Does anyone know if there are still miner tasks that require blighted materials? At least that way I know to contact lower levels and hope they have some lying around.