Henderson this year has made 1 start on 4 days rest, 9 starts on 5 days rest, and 7 starts on 6+ days rest. Misiorowski this year has made 4 starts on 4 days rest, 16 starts on 5 days rest, and 9 starts on 6+ days rest.
So here lies the issue with your plan, 4 days rest is not normal rest for these guys. 5 days rest is normal rest.