Well, this is a bit depressing. For Minecraft mods, this was one of the Great Ones.
That being said...
... thank you for what you have already done with Thaumcraft.
Quote from EverRunes
The current gen from TE alone is insufficient for these other RF-using mods.
Quote from xeronut
Might I recommend using something like Mob Spawn Controls? It works for me at least - Mirage Endermen from Special Mobs lag my server hard when they retreat from battle and multiply. I disabled them. I don't see why this wouldn't work for nitro creepers in Natura as well. Please correct me if I'm wrong.
Quote from MusicallyInspired
I've found two Archmage towers without even looking for them. I find that you discover things more quickly and easily that way. And it's more fun too.