1. I would recommend in picking just ESET Smart Security
2. There was a discussion on Wilders regarding 360 compatibilty with other security programs.
In Total Security changelog, it reads (Since they added replaced IS with TSE, I can't find IS version history)
(
http://www.360totalsecurity.com/en/version/ts/)
" v5.2.0.1074 Nov 25, 2014
- Added: Improve performance when installed with other anti-virus software"
Regardless of that, most users agreed that you should use only 1 antivirus software.
I don't recall if anyone has tested the validity of that changelog. And the compatibility with other security software might not work with the latest version though.
But like already said, I would suggest ESET Smart Security.