You need to pick one hard way set and use it every time as you enter it into the roll recorder.
It depends on what numbers you like to have on top and it is your choice. Changing sets will defeat the purpose of the roll recorder at is summarizes the data over the long term.

The very best hard way set is putting the fours on top,and sixes on the right. By using this set, your thumb will sit on the hard ten pips and this is very helpful in determining the proper position of your thumb (left, right, high or low). You may remember this tip from class.

After you pass one of the three smart craps tests using this set only, the software will give you optimal dice sets to use in the future to target certain box numbers or come out seven sets.

Hope this was helpful.

Mark