For those who follow on, those brown cloud things around the terrestrial reformer machine from Witching Gadgets in Thaumcraft mean it's working. The brown is due to the arbor essence, I think. Color probably varies with the focus type being used. I'm running jungle because I like those greens. There's also an animation of vis particles drifting from the energized node over to the reformer. May need goggles to see those.
And this one shows the greening spreading a bit. Most of the coords are now jungle, though a few are still either beach (near the shore) or wasteland. The biome colors seem to blend a couple coords out, so that generally works for me. I think the randomness is not of the remaining unreformed coords, but of all of them, so would take a long time to convert every last coord. I used 16 jars of 64 essence, which should blanket a 16x16 coord area otherwise (unless it's actually 17x17 or something, may test more later.)
The pond was all brown wasteland water, now it's mostly blue. The old wasteland edge was around the right quarter of the screen.
Now back to making loads of arbor essence. Or maybe making golems and automating that.