On a hard climb my #2 is the hottest, the reason I know this is I have a 4 cylinder EGT/CHT. Without that you don't know what you don't know! A single probe is about as useful at tits on a boar hog. Every plane/engine is different. Get a 4 cylinder EGT/CHT it will save you money in the long run.
DENNY
The best thing about EGT gauges is to be able to troubleshoot/monitor individual cylinders. Impossible to do with only one probe. Put one on each cylinder.
Jerry
They both have the same amount of problems. It is just without a 4 cylinder EGT/CHT you have to wait until issue has caused enough damage that you notice it. Burning a valve from an intake lead, CHT'S over 420 due to a crack primer line making mixture rich, bad plug over 2000 rpm, MAG timing issue, Poor baffling, ect. All of this and more is easy to pick up and fix early if you know what you are looking at. One of the problems is finding an A&P/IA that understands what they are looking at.
DENNY