i dont have my book on me
atm but for something like 175 points you get 5 Legion of the damned
LotD have a 3++, ignore cover, can re-roll scatter cause they have to
DS also have Slow and Purposeful so can fire the heavy.
the sarge can take a combie
a marnie gets a special
a marnie gets a heavy
if you take plasma you get 4
AP 2 shots assuming good scatter.
your heavy can be either be more AP2 with a plasma cannon or lots of shots with a
HB.
and then 2 more biloters
So assuming average rolls you should hit with 3
PG shots 3 bolter and 2
HB or 1
PC blast (wounds vary) or
MM shot.
your wounding on 3s and 2s
so averaging 3 wounds no saves and 3 bolter shots which will probably save.
(this is not excat math but about acurate if some one REALLY!!!! wants to be a math genius go for it

)
so that takes out a good chunk of reapers, leaves a tough unit inside of enemy Deployment zone.
and like i said before. easy conversion. heck you could just base coat some of your marines black and be good to go. other wise a little white for skulls and red for fire and your good to go.