After a hundred and one pages, the quest can finally start! Yay!
Based upon our experience from Ignition, we can probably guess that we're going to be very out of it for a while after Overchanneling ends- so I would like to have someone ready to watch over us if possible. Azura is basically our only option for that.
I suspect that whatever we choose here will determine our initial skillset. At a guess, balance of fauna is summons and the subaction includes creature buffs; balance of flora and the subaction is probably Wild Growth-type effects; purifying the atmosphere and removing toxins seem like disenchants; closing off the forest from the outside world is something like Fog, possibly as an enchantment; setting up an anti-black enchantment is more lasting enchantment and directed color hate.
[x] Close off the forest from the outside world. There's too much for you to do in the time you have available. (Full Action)
-[x] Wait for Azura to return before you do so. (Free)
[x] Set up an Enchantment over the forest, banning Black diseases and abominations from forming within its boundaries. It won't do anything to bar them from entering, but it's a start. (Full Action)
A defensive, enchantment-heavy skillset full of black hate sounds like just what we need to survive and gradually cleanse the PMMM world.