It seems to me that you don't have a real focus for your army. I am one of the first to admit that Tac. and ASM can be extremely useful together, but the way you have it, you have 2 units staying back (or one back and one advancing slowly), one squad rushing forward (this squad will [probably be killed fairly quickly) and one DS dread and then the one tank.
What I would suggest is either keeping your units back or moving them forward, especially at 1k points. At higher point values, it can be effective to have a mix of units like this. At only 1k though, it's pretty easy for their anti-tank to take out the pred, or the dread, with only limited difficulty. And 9 times out of 10 your devs really wont be able to kill their anti-tank unit T. At low point values, you really need synergy in your list.
What you could do with that is to go ASM w/ jump priest and libby (probably 2 squads), then take some predators and maybe a DS dread if you want. The Tac and the Devs, in this list though, dont really fit. You could take an AC/LC pred, that would do effectively the same thing. Then take some flamers in your second ASM squad.
Maybe something like
Libby (JP) - 125
Priest (JP, PW) - 90
RAS (2x melta) - 210
RAS (2x Flmr) - 200
Baal (AC/HB) - 145
Pred (AC/LC) - 135
with 95 points left, you could either change the loadout around, get some sniper scouts, or whatever.
Another option would be a bio list, replacing the preds with a Tac. and Devs.
So something like
Libby - 125
Priest - 90
RAS - 210
RAS - 200
those layouts are the same as above
Tac. - 170
Devs (ML) - 130
In this one you have 75 points left.
The thing is with your army is that it mixes mobile bio with stationary bio with stationary mech with mobile mech. I would try to bring it down to two of these four, at least at 1k points.
Good luck with your list
If you go down to the woods today, be wary