The Bell Invictus should be able to meet all requirements. Guessing a 12000-14000 lb gross weight with as much hp as the much larger 20000 lb Bell 525.
The Defiant X needed 10000 hp to "go fast", with a planned increase to 15000 hp. So 30000lb/10000 hp = 3lb/hp. Raider X would then need 16000lb/3 or approximately 5300 hp. It only has 3000 hp. The Sikorsky X2 had 6000lb/1800 hp = approximately 3.3 lb/hp. Raider X is trying to haul 16000 lb/3000 hp or 5.33 lb/hp.
Raider X may not be faster than the Invictus, and may even be slower. Then Raider X loses because of increased complexity and weight for no gain. Therefore Sikorsky has a strong incentive to start over with a twin engine design.