Welcome and i'd say good choice for starting with
DA.
firstly i'm guessing you want a
DW list right? where are you going to start playing
40k? at your
FLGS or with mates?
do you know what your opponents take ? flyer heavy? massed infantry? vehicle heavy?
secondly I've found our Vets to be a bit rubbery as opposed to vanilla marines sternguard.
Belial's builds pretty simple,
TH&
SS or Sword of Silence and storm bolter. so you get either a 2+/3++ or a 2+/4++ really it depends on the opponent and your preference.
My personal Termie build is a 5 man squad with 1
TH&
SS and an
AC perfect for pretty much any occasion. This squad will cost around 245pts x 2 and there's your basic troops done.
So here's the basic choice :
Belial Sword and storm bolter ( he's re rolling one missed to hit, and wounding anything bar vehicles and walkers on 2+ )
2x5
DW termies with a
TH&
SS and
AC in each
Now remember you need to start with at least 1/2 your army on the field ( you can have half your army deep-striking rounding up so if you had 7 units 4 could deepstrike)
Here are your other choices for elites or fast attack:
5
DW knights with Perfidious relic ( T5 when in base to base contact also get to use smite attack one per game S10 AP2 just utter death to
MC and characters) or
10 man company Vets with assorted gear or
3 black knights and the dark talon ... personally i'd go with this i mean you've got the speed with these units and you can survive with jinks
then you can drop the hammer down straight on your enemy with the termies and belial.
Another option is to run the vets as a standard
tac squad take the black knights and take the
DW Knights as Belial's unit I've done this before and its fairly strong.
So you'd end up with:
Belial
5x
DW termies
TH&
SS,
AC
10x
Tac squad with
ML with flakk and a melta.
5x
DW Knights with Relic
3x Black Knights
with this you have 14pts spare for
Tac sergeant upgrades.
So yeah any other help needed let me know.