So while I am not a New Player, I am returning after a long delay to finally try out Heavansward content, and have run into a couple questions.

For more information; when I last played Coils T5 was the hardest raid at the time when I played, so it has been quite a long time since I played again.

When i came back, I decided to reroll from scratch on a new server with some friends on the PS4 (used to play on PC, but got PS4 base game + heavansward for 50% off).

I just recently hit 50 again on my preferred class WHM, and got hit with the swarm on unlock quests.

So questions are, what is exactly required to unlock Heavansward content? I understand that the MSQ are required to progress, but what about all the other quests like Odin, and all the Hard Mode unlock quests?

Is there any point now to do the Relic Reborn quest chain, beyond unlocking Thryus for Glamour purposes?

Thanks for any help.