Since I all the jobs leveled this is what I do. Just need/greed anything that is an upgrade for any job you have. If you are replacing a darklight piece its an upgrade. Use myth to get even better gear later on. This minimizes the amount of runs you have to do. Doing so many runs for an 80 piece which is at best 3rd BiS isn't worth it when there are 2 other pieces of gear that are better then it, mythology and allagan.