I'm a relatively new 60 omni so I will give you my process. First, get all classes to 51, then craft the lvl 51 gear. Keep everyone around the same level and in the same gear so it spiritbonds, giving you some materia for your end-game gear. Next, replace MH at 52, OH at 53, then leftside at 53,55,60. At 56 you can start crafting your initial endgame white accessories. Once at 60, craft the Chimerical set and the 140 OH tools. At 55-56, start collecting blue crafting scrips and purchase the 180 MH tools and Master book 3 for each class. Also start collecting red scrips. If you can get an FC mate to craft the WVR 170 OH, with a few light melds to your gear that will put you at 2 star. Then you can craft the Carbonweave gear. From there you can meld that to craft the Ironworks gear. That gear set will last until next expansion. Or you could just have FC mate craft it for you or buy it off the MB. I followed this process and am now 3 star on 5/8 crafts.