Nitor gives a lower 2-3eu/t, but will drain the local aura with 25-50% less yield per vis then an absorber, but has considerably cheaper and simpler recipe.
I think it should be 250-500% more efficient than the absorber, as the absorber drains vis at a much higher rate, disrupting nodes.
The nitor should be a tiny passive generator that will slowly degrade your vis source if you don't regenerate it.
High Temperature super conductor : HgBa2Ca2Cu3O8 (134 K - wiki) , how about adding this to the game as an alternative for iridium in superconductors ?
Barium is either made with UUM or extracted from nether quartz in very tiny quantities. 64 Nether quartz dust -> centrifuged for 2 tiny barium dusts (and other quartz components).
Also the conductor is made by an advanced chemical reactor, which allows the mix of up to 8 chemicals, resulting up to 9 outputs. [aka allowing the decomposition or "fusion" of elements]
mercury Cell + 2 Barium cell + 2 calcium cell + 3 copper ingots + 4 compressed air cell = 1 superconductor ingot (HgBa2Ca2Cu3O8), which can be used in the superconductor recipe as iridium replacement.