I'd run more ven dreads than run a pred.
I don't think you need a land raider in this army.
I also don't think you need a dedicated
CC unit in this army.
Deathwing with ven dreads lends itself to moving wherever it needs to, and smushing the enemy flatter than a pancake with shooty.
The main problem I see with all deathwing armies (and in fact, all terminator armies outside the new smurf codex) is you have ZERO meltaguns.
That means you will have a hell of a time killing tanks.
Personally I'd probably do this:
4
DW squads.
3 ven dreads.
3
AC/las preds.
Then add in more
DW as you can. I'd also take
CML on the
DW. They aren't good at asscannon because with the change to rending and vehicle damage table...you might as well just not try to kill vehicles with
DW at range.
CC you sure can, but at range...forget it. Only
BT can do it now, because they get tank hunters AND double asscannons...and it's STILL not a guarantee, but it is very good in the realm of 5th edition.
Hope that helps man.