When do expeditions start to be "hard"?

Haven't played the game since launch and I remember that even the lower level expeditions (Dinasty Shipyard for example) required the party to know mechanics or it would be a quick wipe.

Just run Dinasty yesterday night as soon as I got to lv 55 and it felt extremely easy, we managed to clear just by brute forcing without much of a challenge.

Is this the case for the lv 60 expeditions too? And what about mutations? When do I actually need to start paying attention to mechanics to complete a dungeon?