Some Question regarding story quests

So, I have not played in a long time (around 3-4 years), currently in have a drakania as my main and finished the every story quests that came out prior to the snow mountain one.

I somewhat started the snow mountain quest in an alt, in the middle of a season, but then stopped playing the game.

I now made a seraph for this season and started with the land of the morning Questline and probably finish it soon (it's the worst piece of content bdo has to offer IMHO). I'm planning on making the seraph my new main and use an xp/talent transfer i still have lying around from a few years ago.

Now the question: are there any storylines I SHOULD do for the seraph, are there any actually required things I need from the other storylines? I know about the Magnus quest, but that's something I gonna do either way.