I just needed to read up on Multimodals, so correct me if I'm wrong. This expression returns the highest of the two values that has the highest number of occurances (right?):
Max(
Aggr (
if (count( Num)>=Max(total Aggr(count( Num),Num)) ,Num),
Num)
)
I use the Aggr function to create the list to pick from. So change the first Max to whatever you want to pick.