I've seen the node Banzai was mentioning. The guy edited the NBT to make it so the node was so large that he couldn't fit in a single picture and if he tried to get even slightly further from it it would've been out of his render distance. However, while making one that size might be possible, it isn't feasible to do it and you'd be better off with multiple smaller nodes. One example would be to create 12 nodes at about size 3k, with a node of about 2.5k in the center. The 3k nodes will feed the smaller 2.5k node when it gets used and since it's spread out over a larger area you have more areas where you can place crystal clusters to help restore the aura. This also has the benefit of spreading any flux created over a larger area. Something else to note, the new Wand of a Thousand Hells that summons bats and the iron golems use aura like they're crack fiends looking for a fix, so unless you have a good aura restoration system in place don't use them too much or you'll get a massive amount of flux and aura depletion.