If the opponent does not set up the objectives well over your centre line    

I've got a couple games scheduled for tomorrow (hopefully they'll happen).  The first will likely be against a Titan legion with 2 imperators and warhounds (yawn).  The 2nd game should be against standard IG.

I intend on trying out the following list at 3k (3005 pts):
Dominatrix + 4 termagant clusters + trygon
Hive Tyrant + 2 Tyranid Warriors + Haruspex Cluster + 3x Hormagaunt Clusters
Synapse Node + bio arty cluster + 2x termagant cluster
3 tyranid warriors + carnifex cluster + Termagant cluster + Ravener cluster
3 tyranid warriors + 2 ravener clusters + 2x gargoyle cluster
3 zoanthropes mixed in wherever

5 activations (so at least I'll out-activate the titans).
I think it may be a bit slow, but we'll see how it goes.  Thoughts?

Well, that didn't go very well.  We weren't able to get the titan game in but we did play a game w/ Steel Legion.  After 3 turns, I had managed to kill 1 russ (Trygon!) and 4 stands of rough riders (Exocrines!) vs. most of my army.  Basically, my army was way too slow/short-ranged and I failed a couple of really critical initiative/retain rolls.  I'll try to get some photos and a more detailed list up.  

I did learn some valuable lessons:
- Keep bio-artillery mobile.  Attaching them to the Synapse Node was not helpful
- Nids need SOMETHING that can project power.  Whether it's flying creatures, lictors or whatever, they need to be able to harass while everyone gets into position.  
- Although huge swarms of more basic creatures are fun, there's only so much they can do.  I'll need to diversify my army selection in the future.

... That said, in truth I was hoping that the trade list I put together for you was a fairly viable army.

Even a superbly viable army is worthless in the hands of an unviable general