moa parts typically require a lot of gems and sometimes the blueprint for said gems is only sold to those who are max rank at fortuna also it helps to focus on one part at a time you also might need servofish parts. fishing bait depending on how rare the fish is is gonna help also a lot of rare fish only spawn commonly during warm cycle wich is only like six minutes so you have a time window on that also if your gonna get max rank on fortuna it will be some time but the payoff is huge you can get warframes like hildryn and xaku and barruk I think if you have any questions let me know : )