How about this??
Scrap the Puma extension, buy additional merlins / chinooks to supplement current fleets. Thus reducing costs of old equipment. Even the Black hawk buy, good piece of kit/ good value for money and troops on the ground.
Assign all helicopters to the Army Air Corps, as they are all mostly used in suppport of ground troops. Reducing all the red tape and different chains of command, thus reducing costs at the same time making it more efficient.
Re-Examine the Lynx purchase. Small in size and not even able to carry a fully equiped section of men. Replace with Black Hawk.
Just an idea.