The one setting I do make with MBAM Pro is add the Avast temp directory to the MBAM Ignore List.
This makes MBAM ignore the files that Avast is unpacking to a temp folder while scanning.
Open MBAM Pro, click on the "Ignore List" tab.
Click the "Add" button, select this folder:
C:\Windows\Temp\_avast_
Click "OK", then click "Exit".
Done
Depending on your Avast version you may see one or both of these temp folders to add.
C:\Windows\Temp\_avast_
C:\Windows\Temp\_avast5_
There is no need to add any MBAM exclusions to Avast