Im new to marines and want an all infantry list (to easily fit in a gw case) heres the one ive come up with i dont want to use traits as this list works without them and they will just make my army smaller.
What do you think and will it work?

-bolt pistol
-jump pack
-termie honours

3x 10 Assualt marines
-sarge termie honours pwr fist

2x 5 Scouts
-heavy bolter

2x 5 Devastators
-3 missile launchers

8 Devastators
-sarge termie honours pwr fist auspex
-4 heavy bolters