How many legions are left and what is the status of them?

[RyuDragnier]

(The obvious route would be returning to the Garlean Republic, but I figure it's also fine if they want to try other political systems. The Holy See of Garlemald, perhaps?)

I've always seen pre-HW Ishgard as how the Garlean Empire actually was on their home terf, with post-HW showing what it could become. Depending on how the writers want to take Garlemald after the end of 6.3, it could either stay pre-HW Ishgard levels or could end up being elevated to post-HW. That of course depends on how things with the Empire go next expansion.