I think there are some other threads here related to this question....but I will post mine for my 2006 6.0 as it was also one of my questions when I had the Scanguage installed. I will post my norms...highs...and lows below.
Engine Oil Temp: Normally it rides at 206. I have seen it as high as 220 on a big hill climb. If the temps are really cold...it will go down to 145 or so..but I am talking 10 to -10 at 45-60mph driving. I have done a lot of winter trips.
Coolant Temp: Normally it will be at 10 to 15 degrees lower than the oil temp. It usually stays around 191-195. It will go down to 183 or so when the fan kicks on and has climbed as high as 218 on a big hill. I hate when I see the oil and coolant temps getting close together. I have seen as low as 135 on those -10 driving days.....I think I need to get something to put in front of the radiator so it will stay warmer...gets cold inside the van when temps are that cool.
Transmission Temp: Normally it rides between 170-179. If it is cold outside it will run 150-160...and if hot outside it will run 180-185 or so. It will also increase on a hill climb but I have never seen it much over 185.
Boost: I have been told that I baby mine.....but normal cruising down the highway at 70 the boost will be between 6 and 10.....depending on hills and how the road is going. The same diesel tech who said I baby mine also told me to not go over 26 boost.....bad things can happen. I guess the best way to answer this one is the lowest I have is 0 and the highest I have had is 24. I try not to get over 22 though as a rule for myself.
EGTs: These will fluctuate depending on how hard the engine is working like all the other stuff but norms for me cruising at 65 to 70 are between 700 and 800. They will go down to around 500 to 600 if the terrain is easy and 900 to 1000 if pulling a big hill. I try not to keep it at 1000 for any length of time. If it is staying there then I will back off a bit.
I hope this answers some of your questions. I pretty much watch all that stuff like a hawk and just got back last night from driving about 1300 miles for my Christmas trip to Florida....and yes it was a tour of Florida...lol...NC to Naples to Apalachicola to Orlando and back.
Merry Christmas and Happy New Year....