For the M Vital stars you can get them when you do those on the first board game thing with the die (can't remember Mission number, something like 5th or 6th). Just make sure to land on the blue spaces by timing the hit on the die right and using bust (best way to do that is see what number comes before the one you want so you know when it is coming.) and if you are lucky you will get five chests come down and if you are even more lucky and hit the four right ones you will be rewarded with the M vital star. At the end of the board you can also land on the last yellow space to go back and land on the blue one again but I don't know if it will change all the time or not. So far I got two by doing this on Dante must die. Hope this helps.