It's relevant as the Hydra strategy proposed 10 additional troops per KIA and 2 per WIA.
The historical factor 60 clearly shows that the strategy alone would not have required us to deploy more than we did, nor would it have overextended us to date. This falsifies about half the contra arguments which I heard over the last months.

Btw, the Hydra strategy would not exclude the possibility of additional deployments, especially not in regions without substantial previous presence of Western forces.