Smallest Pair With Different Frequencies

Description

You are given an integer array nums.

Consider all pairs of distinct values x and y from nums such that:

- x < y

- x and y have different frequencies in nums.

Among all such pairs:

- Choose the pair with the smallest possible value of x.

- If multiple pairs have the same x, choose the one with the smallest possible value of y.

Return an integer array [x, y]. If no valid pair exists, return [-1, -1].