I would have said the biggest gap for
DW is really just lack of antiflyer. You could argue about mobility.
I think it has changed with allies but for deathwing you are looking at a foot slogging gun line.
235 points all squads should look a bit like:
serg+
ss/
th,
ss/
th,
ss/
th,
ss/
th+
CML,
lc
with the apothecary being awesome and the banner being a good addition.
Then the typhoons are too cheap to ignore.
75 landspeeder with TML+
MM
Belial probably needs
SS/
TH to stay alive.
You can write the list. It has no problems with staying alive but just with lack of firepower(also dealing with flyers). 18 missiles is a lot less than you think, then certain foes laugh at missiles so probably bring a blend of shootiness.
Most lists which are not flyer heavy will struggle to kill you and push you off objectives with this list.
I used to bring vindicators or preds or dreads as the boost, but why do that when you can bring allies.
Space wolves is tricky but I would be willing to try some terminators assault cannon and combimeltas in a drop pod with rune priest in terminator armour.
then plain grey hunters to man the quadgun and longfangs.
Else razorback grey hunters, rune priest, with
DA vindicator and
SW vindicator.
I guest I will find your actual list