Nice little guide. I can tell the OP put some thought into it.

One thing I would counter with, though, is that the game does tell you what to do at 50 if you're paying attention. If you're just FATE grinding your first job to 50 and doing the bare minimum of main-story questing, then I suppose the game doesn't really clue you in. However, if you're playing it like an RPG, you can find out pretty much everything you need to do that the OP mentions. The first time I did Dzemael Darkhold and got Tomestones of Philosophy, the pop-up Active Help told me what they were, and where to turn them in (that's right, I never turned off the help boxes). Because I try to do all the side quests, I naturally discovered Wanderer's Palace. Given that the game gave me that before Amdapor Keep, I naturally assumed that's the next dungeon to grind through. Also, given that WP was unlocked before the HM primals, it's probably safe to assume you should be gearing up with that before them, too.

It seems that playing these games like they're actually still RPG's is a bit unpopular, but it's not hard to see what to do next when you do it this way. Because I've cleared the quests in a given area, when a new one pops up because I've leveled something up or completed a task, it's really easy to see what to do next.

My suggestion would be to retitle your thread to something like... "Endgame Progression for people that don't like RPG's"