The A-10 is not a credible aircraft these days in anything other than total air superiority
Problem is, if you don't have air superiority (or at least close to it), the life span of an LHA in a contested area will be measured in hours, perhaps even minutes. Unless the F-35B is a whole lot better in the air superiority role than the critics are claiming, it won't be able to protect it's own ships, never mind go after the bad guys on the ground.