Last night I played a 1k game against Space marines, the game was Capture and Control with Dawn of War deployment. The objectives were on opposite ends of the table. I took an experimental no-Genestealer list. My goal was to field as many bodies as I could, as many monstrous creatures as I could and to capitalize on the new and improved Deathspitters. Here's what I took:
Dakka Tyrant with Psychic Scream
5 Warriors with talons and Deathspitters
1 Talon/Barbed Strangler fex
My foe took (as far as I remember):
1 Chaplain leading an assault squad
2x Tactical squads with flamers and plasma cannons
2x scout squads
1 Dreadnaught in a drop pod
He dropped the Dreadnaught on my objective in the first turn and marched his assault squad on, wiping out my Hormagaunts who only inflicted 2 casualties in return. The next turn I shot up the 'naught with my Warriors and Sniperfex. Took me two turns of shooting to drop it. My gaunts were held in reserve and marched on around turn 3, and went into a mad dash to reach their objective as I realized my fatal mistake. The game ended on turn 6 and if I had one more turn I would have reached his objective. He only had 3 scouts left on the table and they held the objective for a draw.
This is a common situation in Capture and Control; I played a game against Daemons where he only had 3 Daemonettes guarding his objective with everything else dead but I just couldn't reach his objective. I have also lost 90% of my force but prevented my opponent from contesting my objective by surrounding it with a mass of gaunts. Can't kill 'em all!
While thinking about this I came to the mistakes in my plan. Since Tyranids have no transports we have to rely on footsloggers. In a game where the objectives are at opposite ends, you have to make your decisions in the deployment phase instead of pulling a Fritz (last turn turboboosting jetbikes to contest objectives). For Tyranids, we have choices that can handle this, here's what I think the best options are.
Flyrant: Big and expensive, also very fragile. He can deep strike or fly around and contest. I don't think he's the best option because of his expense and fragility.
Leaping Warriors: Since they don't have fleet it is probably not the best option to use them in this capacity. Sure they can charge 12" but in my opinion they are best delegated to shooting.
Outflanking Broodlord/Genestealers: Probably the best option. However, the chubby Broodlord can't fleet so make sure he is used with caution. Regular Genestealers outflanking are fantastic- the only caveat is to make sure you take multiple broods. Outflanking relies on luck and if you roll poorly you'll be a long ways from home. Stealers are still our best option as they are fast, T4, and can utterly destroy a unit guarding an objective. Make sure they have a follow-up brood in case things don't go your way.
Hormagaunts: Very fast, but fragile. If you use them they need to be supported (especially because most of the time a 12" charge will take them out of synapse range). Lictors make great support because of Feeder Tendrils, but more on them later.
Regular Gaunts: If you can get them there without them dying on the way. They're best for holding home objectives and just getting in the way. If you plan on using them to take the objective they need to start on the table, not in reserve (which was my mistake).
Lictors: A chancy choice. If they appear too early they won't do much good as they'll be killed before turn 5, but if they appear late they will probably work very well, depending on what's guarding the objective. I have had low success using one, I think in future lists I will try and run a pair to see if that improves their chances, along with trying to get some other broods in CC with them as well to benefit from Feeder Tendrils.
Raveners: Fast charge but very fragile. If they deep strike they are vulnerable for a turn. If you go with them, multiples are the way to go.
Gargoyles: Probably an excellent choice, but they are so expensive! I don't actually own any for that reason. Plus I hear they are very top-heavy. Rumor has it they'll be made in plastic but I'm not holding my breath. For now I will deal without them.
These are the units I feel stand somewhat of a chance at seizing the objective in Capture and Control. But first and foremost, it comes down to your deployment. Had I put my Termagaunts on the table at the beginning they could have reached the objective. I had my Carnifexes acting as fire magnets, but I just didn't have enough time to reach his flag. Keep the objectives in mind, not just killing everything that moves.