Lol, don't give the Lord a power weapon, he already has his accursed Croziusm just give him a bolt pistol for the extra attack

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The Obliterators are expensive, but give you good firepower. They also add some resilience, and can draw enemy fire away from your important (Daemon summoning) CSM squads. Good choice

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I wouldn't take all-flamers, add some horrors so when they get shot at you can remove them instead of the more powerful (and expensive) Flamers. If you want to use 10 models a 5/5 mix is good.
Also try to free up some points for that second rhino. You save some points by swapping the Lord's power weapon for a bolt pistol, and by downgrading half the Flamers to Horrors. This won't get you enough points for a rhino tohugh, I suggest you drop the Daemonic Rune on the Lord, as he's an independant character he should never be targetable by enemy fire, and you should keep him away from S10 close combat thingies anyway (those are meant to be shot

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