You seems to be overestimating the difficulty of the content.
Everything that MSQ asks you to do is extremely doable. I can almost guarantee that there won't be any fights between ARR and the end of SB that should hamper you or your party for very long. They are all generally made with the idea that they can be cleared on your first or second attempt, especially when overgearing is taken into account.

You really do not need to unsyc hard mode trials. And in fact, just ignore that it says hard mode, that's a misnomer. Hard mode trials generally are not hard, and once you've gotten some experience, they'll only get easier.