A viable strike-carrier and LHD fleet ratio

What ratio of amphibious aviation ships to strike carriers would be most useful?

Two strike carriers and three LHDs is a plausible minimum; three carriers and four LHDs would provide stronger continuous availability.

Four LPHs for one carrier would create separate, incompatible aviation fleets and reduce flexibility. Two strike carriers and three LHDs are presented as a plausible minimum that would usually make one of each available. Three carriers and four LHDs would provide the stronger ideal.