The following packages might cause problems:

scim-pinyin
hermes
recaller
shortcutd
callnotify

Remove them first. Reboot and then check the system performance, especially on taking calls under load. Reinstall them one by one, and repeat the checking, etc.

Also, what range of frequencies you set the kernel at?

I also notice you've installed a lot of account plugins (haze, butterfly, salut). Do you turn them on all the time?

While you're at it. What is your firmware version?