Wait a few months since your last treatment and see what grows back. I doubt you will get enough regrowth to eliminate the patchiness. The only way to get rid of the patchiness is to get more treatments and finish the job.
What percentage of your beard is left? You can finish up with electrolysis too.
I would try some Nd:YAG treatments. The longer wavelength will penetrate deeper into the hair follicle. A Nd:YAG, with a large spot size, such as the Coolglide CV, will work best.
Did you find the Comet to work any better than the Aurora?
Once the follicles are dead you cannot bring them back. Minoxidil will not help.