Duck, that sort of defeats the whole point of creating an infestation. Imagine if in Aliens the colonial marines could just drop down a vial and kill all the aliens. The Dark Magic plague is ridiculous: It is unsurvivable, spreads in mere hours, kills only its chosen targets etc. Its Syphon Filter on steroids, one could actually have immunity to that! 
As its not a real disease, it completely bypasses the Corruptelae Insectums disease resistance and just kills them all. Why bother setting up an infestation? Hell, why not just use that plague on everything you come across, you seem to be able to make it and deploy it fast enough.
I think that, as the weapon can be tuned to a single species, and is just generally all round unstoppable... And can be made and deployed within a few hours of an infestation, that its kind of bullshitty

How have you easily eliminated the Lance Humans? How did you find the hide out? A foot wide hole in the entire jungle world and you just found it? Even if they were out of the hole, how did you just sneak up on them? Don't you think using a psi-blocker would have actually made them easier to detect? "Hang on a minute command, we have a zero energy blob..."Oh, and they would still have their abilities, just because they can't use their powers directly on Pegasi, they could still blast energy at them, launch rocks etc. Also, the Pegasi have the problems I pointed out with combat in the woods for their species earlier, giving the Lance humans an advantage (And they're lying in wait in a massive jungle world...) getting rid of them is neither quick, nor easy. Also, these units aren't alone, if you encounter lance humans generally you will encounter Saeva Simiu

On the subject of Saeva Simius, Ima capture those stealth talismans from the wookies, hehe.

Oh, and you ignored the Aru'shumi almost entirely, merely slowing their surprise attacks. Bad move, your forces are about to get set upon by the death before dishonour birds, who are going to have a great time eating them and absorbing their genes...