@H12rpo
You might find this table of help:

It does indicate the optimum ph for your mash and the relevant temperatures and enzyme activity.
There may well be some grain mashes (I think maize might be one) which benefit from boiling but, malted barley isn't one of them
In beer making the wash produced by mashing is boiled before fermenting but that is not part of the mashing but more for hopping and liquor clarification, neither happens for a whisky wash.
Many, I think would heat to slightly in excess of 70ยบ C before introducing the cooler malt
A stepped wash would take it in two or three resting stages up final temperature..
Mashing is an all important stage in producing an all grain product as it will massively affect your final product. Well worth a little background reading as grain is not inexpensive and peat smoked grain quite scarce.
Once you have the routine off pat you will quite enjoy it.
Good luck