@PharaohAtem Ugh fine you can have a spoiler :P Leval's secret tech are in my head named Field of Threads and Deception Made Real. Field of Threads works basically how you described illusory domain along with its incredibly high costs. Essentially the entire domain would be covered in his threads of magic to A) Conceal Leval in Magic in potentia for those trying to see through his illusion and B) Allow for quick casting. It is not something I imagine him doing for a while yet. Deception Made Real is essentially layering Leval in illusions of himself while he performs actions. So even though characters see the illusion covered Leval coming at him they will also note that the figure is illusory and giving all signs of being fake. So they will expect that figure to be the illusion and the real Leval is elsewhere. They expect an illusionist to hide not strike directly. And then while they are distracted looking for the "real" Leval, not so surprise strike. This works even better if paired with making a random patch of air invisible so there is something else to detect.
Also Leval is not above tasers and bear mace.
Also Leval is not above tasers and bear mace.