#25 big game is what I use on big baits like rats, wake shads, bull shads, etc..
Don't over think it, it's not a finesse application, if #25 is too much, go to #20. No way I'd go with smaller hooks, most of the bigger baits have been tested with the hooks they come with not to hinder the action.
With big sharp trebles I want some stretch and strength. Line size will not affect the baits action in your scenario.