combining imperfect random number generators for shuffling an array

Shuffling an array to create a random stream for encryption is well known. The weakness is in the security of the random number generator that performs the shuffling. But is it true or likely that the same array shuffled by two or more imperfect random number generators becomes more secure as it is shuffled by more numbers of known to the enemy random number generators.

The shuffling is a form of undersampling which increases security in my thoughts with the random array becoming more secure as it is shuffled more. Comments ?