BlkTom, thanks for constructive critique. Let me try to argue my choices:
You have alot of units that need to get within 6-12" of the enemy and scatterable artillery... specially Manticores that can have multiple templates so in effect can scatter the full 12", even with the -3 due to BS.
I don't mind artillery... with the right list, but you need to ask yourself if this is really the right list for them... and I say no.
The trick is that I want to combine 2 manti, hydras and 2 vendettas in 1 list and make it competitive. Because I have the models
. And I can shoot with manty's to targets not very close to my vendettas and their passengers. So scattering the rocket rarely damage my own forces.
Maybe you give me advice, which list is more specialized for this?
Your CCS Vendetta will get shot down first by any intelligent opponent, due to the BS 4 vs BS 3... any sane opponent will let the BS 3 guys try to suicide in to blow up a landraider when on average only 2 will hit. Well, not let them...but will kill them second. If your going to do this tactic, you have to keep the units the same, at the same cost.
Of course, enemy want to do this. But in most cases he can't. Why? Because if I go first, both vendettas go flat-out on scoutmove. Then they deploy meltadeath, and 2 armored targets of my enemy is dead. After that enemy may shoot to whatever he wants - it's too late, mission of meltadeath is comlited. If I go second, both venda's go to reserve by outflank. When they came, again I will have first strike and deploy my troops. They have about 18 inches of melta-range by outflank and about 24 inches of fire range without melta range. After that enemy again may fire to whatever he wants - melta troops always deployed.
Why are you wasting points on heavy bolters on your Vendettas? That could be points used to upgrade those AV 10 Scout Sentinials to ACs so they can actually do something against transports. If they do have Land Raiders, they certanily are not helping you if your throwing away your Vendetta to suicide them in. And if your sitting back to shoot at vehicles they are not helping you either.
Maybe I'll shoot all enemy vehicles, so venda's will fire on infantry or 10-11
av vehicles. For only 10 pts I have 6
hb rounds - cheap and tasty. But I'll think about
AC's on sentinels - it's a good idea.
I also fail to see a reason for the Astropath... as if your not outflanking 3+ units a game, it is wasted points. That could be your 3rd AC on the Scout Sentinals and two more psykers.
I can outflank:
1) vendetta
2) vendetta
3) chimera with Harker
4) sentinels
And I can reserve all my army, if needed, so astropath is a good choice.
Is that 2 add. psykers that needed? With my 6 there -6 to
ld, with 10
ld enemy it becomes 4 - good enough, I think. And blast with 6
str wounds most enemies on 2+, as with 8
str.
But I'll think about
AC on sentinels. Thx for advices.
Marthike, you list is interesting, but for me too... linear
Is that much chimeras (9) on the front are good and competitive?
Orks, 
Eldar, 
Lamentors, 
Pre-Heresy EC, 
CSM EC, and 
IG. 
Mordian Iron Guard - Major Overhaul in Progress 
