Hi Raj,
Before proposing any solution i have one query. Since you want system to suggest picking location from Bulk pick area even if the qty are less the the control quantity. What is the use of Fast pick area and why the picking strategy is defined as M - Large small quantity when u don't want system to suggest the picking based on control quanity.
Based on your reply we will be in a position to provide the solution as per your business requirement
Cheers
Manish