Best Rates!

Hello, and I wanted to have some feedback on what rates are the best for a server getting 35+ people on it. Usually if my server hits above 30 the ticks per second will jump down from about 25 to 15 or 14.

This isn’t a player cause because I have looked through the logs and checked if they were spawning any props etc. and nothing had happened that was severe in the minute or two.

sv_maxcmdrate 33
sv_minupdaterate 33
sv_maxupdaterate 33
sv_minrate 30000
sv_maxrate 100000

That’s my rates for my server I’m not very good at figuring what are the best rates for my server. If someone could give me some support it would be appreciated.