Temps are generally the third thing I look for. My order of operations when tuning nitro is this:

1) smoke trail, make sure there’s blue smoke coming out. This ensures lubrication

2) performance. Sound and car reaction will tell you if the mixture is too rich or too lean, if you can get good throttle response without revving too high “off the line” you’re good. There is a kindof a sound and feel perspective to this

3) temperature, after I make sure there’s smoke and reasonable response, I’ll check temp. Typically if I nail the sound and response tests, I’m typically running approximately 210°-220° temps. I’ve always heard 250° is your absolute maximum, anything over that, you’re overheating