I'm casual, I only maxed out one battle job~ WHM ang got my +1 for it. The content that made me feel me challeneged and ultimately "bored", was the extreme primals and to an extent, Ultima HM. Why? Mainly because the "learning parties" I set up typically disband after a single wipe :/ Ultima HM & Garuda ex so far don't seem exceptionally difficult, but just need learning, which is something I'm still incapable of doing due to the lack of learning parties and the impatience of those who participate in them.

Everything else in end game up to Coil 2 felt "OK", not easy but not insanely difficult either.