At the present time there is no defined area, (Sum Cluster Alert, or Sum Cluster) to assist in choosing a valid sum range. But, seeing that the average sum is now 89.0, one could utilize the sum range of 89 to 100 for effective sum reduction.
Additionally 50 to 65 appears interesting.
Sum reduction is the most effective way to reduce excessive number strings when wheeling a large amount of numbers.
Edited 8:52 P.M. >> The numbers are 04-08-21-25-33, Total Sum= 91. The sum range of 89 to 100 was effective for this evenings draw.