I swear, any Hard, Nightmare, Extreme and Inane Levels are just easy if all the enemies that spawn are all Marauders (Biker Dudes as you refer to them) so long as you've got ar least two Mechanic Units, a Full Mechanic Team or anybody with High Bullet Resistance you'll be receiving your Three Stars without even having to use Buff Items, I guarantee ya
![Dead Ahead : Squad vs Bikers [Nightmare Difficulty]](http://i.ytimg.com/vi/hNTZZb4pXy4/mqdefault.jpg)
I swear, any Hard, Nightmare, Extreme and Inane Levels are just easy if all the enemies that spawn are all Marauders (Biker Dudes as you refer to them) so long as you've got ar least two Mechanic Units, a Full Mechanic Team or anybody with High Bullet Resistance you'll be receiving your Three Stars without even having to use Buff Items, I guarantee ya