Hmm... Let's think about this army list

Posted my 750 carnage space marines army list on Dakka, hopefully the others will help me finalize it. This is it:


HQ Ortan Cassius OR Chaplain w/Terminator Armour and Storm Bolter 
125 / 130  
Troops Scouts w/sniper rifles and missile launcher 
85  
Heavy Support Predator w/ sponson mounted heavy bolters 
85  
Elites Terminator Assault Squad (2x lightning claws, 3x thunder hammers) 
200 
Dedicated Transport Land Raider OR Land Raider Redeemer w/ pintle-mounted multi-melta
250  
745/750 points  


My battle plan is as follows: Land Raider (supported by Predator) goes to center and camps there w/ chaplain and Terminators inside it 
Scouts provide long-range support 
Chaplain/Cassius makes Terminators Fearless so they will not retreat 
Any infantry will be taken down by Terminators, Predator heavy bolters and/or Flamestorm Cannons in LRR 
Any Daemons and the like will be taken down (or at least weakened) by sniper rifles, autocannon, and other heavy weapons 
Any vehicles (specifically AV14) will be taken down by Lascannons on LR, alternatively multi melta on LRR and scout missile launcher
The Predator alone can take care of everything else...  


Now I have to make a choice between Cassius/Chaplain, and LR/LRR. This is still a hypothetical army, but it will tell me what to buy next.


I'll see what comes up... I'll buy the predator and scouts first because they're pretty much set, but I have to wait for the rest.


My cautions (which I haven't posted yet) are so far:
I think that Cassius' Toughness of 6 will make up for the fact that he only has 3+ armour as opposed to 2+. However, I'm not too sure if his Infernus will cause assaulting limitations as he is pretty much tied to the squad. 
Also, the Land Raider will be more effective than the Redeemer because it can start firing from the beginning with its range of 48" instead of having to wait for enemies to get into 24" to shred them with its assault cannons.


Will post improvements later...