Well for my new world I kinda got both lucky and unlucky. Very close to my spawn point is a burrow hill, and I'm very close to a desert where a pyramid's node had gone haywire and fused with another node, so there's a fair bit of flux in my starting area. I need to find more silverwood saplings so I can put more "filters" around my base to help with the evil wisps that sometimes spawn.
If you get the research for it done you can also start making crystal clusters which will supply I believe it was stated as 1 aura per 5 minutes per cluster, and they can overfill nodes. With enough of those and a big enough node you can start creating more infused stone if you let the aura levels get high enough, so over time it becomes a system that feeds itself, albeit slowly.