Hey guys! Building a very good team in MUT if you are NMS, or are a beginner can be tough. Here is my biggest tip to help you. I recommend sets! Sets will be your biggest friend! Let's say, you wanted some of the 94 campus hero cards! You should buy 3 94 Campus Heroes cards for around 150k each(450k total)! Then, make one of the 96 master sets! The master sells for 300k after tax and you get back any 4 94 CH NCATS back of your choice. Therefore, you end up spending only 150k for 3 94 overalls rather than 450k. This applies for program Masters/Hero sets for Harvest, ZC, Gridiron Guardians, Most Feared, Ultimate Kickoff, etc.
I hope this tip helps you get upgrades for your team without spending too much! I did this to build up my team since I am NMS, and I hope that you can do the same with this tip!