I run a full energy sim on MK V (5 dot) mod challenge. I usually get 2 or mor 3 and 4 dot mods. Then to top it it off, the 5 dot mods that show up are multiples of the same thing ie 3 circles, 3 squares, etc.
Make it so the results will be a minimum of 1 for each slot the characters have. The a couple duplicates will do no harm.