1. Start with most recent audit and exam. Make sure all items are addressed.
2. Make sure you are good with OFAC and 314a and are filing reasonable numbers of CTR's and SAR's timely.
3. Then I would follow the 4 (soon to be 5) pillars and identify and address all program weaknesses there as fast as you are able.
4. As for risk rating, understand how they have been trained and address weaknesses there early. Prevent new problems
5. Work alerts for 2-3 months and you will probably spot many of the mis-rated customers. Locate your MSB's, NBFI's, NGO's, Private ATM's, high volume wires, NRA accounts, etc.
Just my thoughts.