So here's my go at some semblance of a 6th Ed. Deathwing list which I know I can do with the models I have on hand:
Belial
(really leaning toward
TH/
SS for survivability and hitting power, yes I know fleshbane is 2+ against models with a T value, but the
TH will crack fools with T4 into the stoneage, plus concussive for a drawn out challenge, plus 3++ over 4++)
10 Deathwing Terminators
All
TH/
SS
2x Cyclone Missile Launchers
5 Deathwing Terminators
SB/
PF
Cyclone Missile Launcher
5 Deathwing Terminators
SB/PH
Cyclone Missile Launcher
5 Deathwing Terminators
SB/PH
Cyclone Missile Launcher
Pure West.
Current total is 1465 so I can cram some chain fists in there, or drop the 3 cyclones (the 2 off of the
TH/
SS Squad and replace one of the others with a Plasma Cannon, or an
HF and 2 chain fists) and throw a Terminator Librarian in there.
Basic idea is to put Belial with the 10
TH/
SS Terminators, deep strike them T1 and run them in a high-threat position, then grit my teeth through my opponent's turn. I can then keep 1 more unit in reserve (rounding up for 50% units on the field rule) and bring them in with Belial's teleport homer to double up the threat/scoring.
C&C welcome

I really have no experience with a
DW list