For the NA spec vehicles, make sure the long evap/suction line to compressor is insulated. You can probably do a better job than when it left the factory. It’s right beside the exhaust, and that extra heat will be absorbed by the hose and thus refrigerant which will equate into higher refrigerant temps which means higher air temps exiting the evap. Could be as much as a 5 deg delta. I also noticed that in prolonged stop and go highway traffic at “high” ambient temps (35-37C), my coolant temps (using a scan gauge) were getting too high, so I would shut the a/c off when you most needed it. The aux condenser fan is a must in such situations.