I finally found a solution that worked for me regarding ventrillo ping spikes and crashes. I was reading a post on another game in which a user was having the same problem. Some one gave the solution that worked for him.
Solution
1. Have Ventrillo Open
2. Open Task Manager
3. Righ Click on Ventrillo in the "Applications Tab" and click on "Go to process"
4. It should take you to the "Process Tab" with Ventrillo.exe highlighted
5. Right click on ventrillo.exe and set priority to high
You should be able to open coh now and run vent smoothly. This worked for me perfectly. I am not sure if this will work for skype or team speak but you can give it a try and hope for the best.
(Sorry for the detailed description, making sure everyone is able to follow the steps.)