The star crafts are stall tactics, intended to keep people busy between expansions. The 4 star 50 has the same difficulty as a level 58 standard difficulty. It's the same at 60 and 70. The same will happen at 80 eventually.


In terms of rotation, you don't need cross class anymore and because you went Culi you don't need cross class mats. The only thing you will struggle in is gear. Go check the levequests in Ishgard. Eventually at all levels you will get HQ main and off hand as well as some body stuff as rewards.


As mentioned, CP is king but you are going to be CP starved until 56 or 58 no matter what. Baked Onion Soup is your new favorite recipe and pester some FC people to make you sets of HQ accessories for CP right to 70. At 70 you can get the yellow scrip stuff but you are in for a slog to 66. Then it's smoother sailing to 80. Again, only if you keep CP as your top priority.