I have been playing them for a couple of weeks now. I purchased them on a whim, at the behest of a friend to play in a tournament locally since my main force is unavailable right now. So far I have been very impressed with their game play. I am going to try and discuss how I have been using them and cover some of the pitfalls that I have run into while playing them.
My current list for them looks something like the following:
Imotekh the Stormlord
C’tan w/ withering world scape / eye of death
6 x5 warriors
-harbinger of destruction w/ solar pulse
-4 harbingers of transmogrification
-lord w/ warscyth, rez orb, and mind shackle scarabs
3 annihilation barges
6 wraiths w/ 1 transdemential beamer, 1 particle caster, 3 whips
So far, the list has been working out really well and surprising several of the local players with how well it seems to come together. In large part because of the ability to handle close combat really well. For example, last night against black templars, the wraiths where able to whip out 3 units of space marines, 3 laz razorbacks, and a 5 man terminator unit with ease.
The best way I have looked at it so far is that they re a very versatile force. Initially I thought that the low initiative was going to kill them in close combat, but with proper planning things have been working out more and more into my favor. The other key that I have found is to keep tremor up on hostile units. You want to ensure that you cripple their mobility and keep them fairly locked down. This is important because it allows you to define how/when you are going to launch your attacks.
Now the hairy part. I am trying to figure out how I would defeat a similar army with my Imperial Guard. My initial reaction, based on the other styles of this list floating around is to add some flamers to the list. I normally run high melta/plasma counts, so with flamers I could mitigate some of the threats posed by the large numbers of scarab farms running under this. For that matter I have considered adding scarabs under mine as well to deal with armor, but it has yet to be an issue. Other than that I would need to rely on my 2 Medusas to weaken them further, and faster. Without playing against them I think I will have a bit of an uphill battle, so I will need to play against this list to get some test games in, but it is still going to be a hard fought. A local guy played in the Indy GT this past weekend and ran into the scarab farm version of this list and got rocked. I am still a little out of the know how on the game, but rough details are that he castled up and tried to play leaf blower instead of pushing ahead and hitting him hard.
Over all of the games that I have played with my necrons, I have yet to see a really effective attack/defense against them other than dark angles termicide, but I will still very new to them and I did not fully know the rules which would have helped me a bit to stop them. I think with a rematch against termicide I would have hundreds of times over better shot at besting it. In any case, what are some of your thoughts on tremor crons? How have you beaten them and what are the major weaknesses you have found?