sync pumping effect

[Cantankerous]

Perhaps you are getting phasing issues and frequency cancellation due to everything going off at the exact same time? Try and put a slight high pass on a few of the parts to separate the frequencies, or do some surgical eqing to help the parts stand out from each other so they don't cancel one another out. The Virus Sounds are very thick and rich, having too much going off definitely does muddy up the sound as a lot of the sounds contain the same texture and tone, you will have to work on keeping each of the sounds unique and individual.