I did a parade on July 4th when it was about 100 degrees out. Start to finish was just over an hour of stop and go. The water temps never went over 95C with a 180 thermostat. My puller fan was running the entire time. It's on a thermal switch and will shut off if the temps get below 85C.
Burping the system will really help with the spikes. Also there is nothing wrong with the
oil temps being up to 100-110C when you are running hard or sitting in traffic. The cooler will bring it back down when you cruise at speed.