Having encountered Thaumcraft taint, I dream about "nuclear powered taint remover". Could you add something like that?
I would like to use "industry" to clean up magical mess. Currently Thaumcraft adds only weak tools against taint, which at the same time are too boolean.
Random suggestion : A magic energy converter would be able to purify bottles of taint into "bottles of purity". However to do so it must be within a magic forest biome. Also it may occasionally taint the area around it, thus a pure node is needed to keep the area clean. It may also consume energy to do so.
Hooray for multipurpose.
Something different: Purelectronics . Infusing Electronics with pure magic, allowing the creation of an electric focus that will spray projectiles of cleansing magic. A proper electric wand /staff is required. Said focus would mainly consune electricity to work, but also a few vis aswell.