After looking at the Dark Eldar codex I think it is safe to say that Raider Spam armies are not going to work like they used because of point cost not with the raider but with the units will be using the raiders. There are some great units in the new book which is a huge improvement from the previous one. I am also glad they made Mandrakes and Hellions awesome. Wyches , I think got scaled back power wise a little bit with their special weapons choices and really you see a push from Phil Kelly to have more bodies on the field. The Pain token idea is a new concept for GW and it will make Dark Eldar tough as the army starts to ramp up they will only get stronger and having Wracks and other units in the list just for Pain Batteries is rough for a lot of armies.
That being said before the book came out I thought Dark Eldar were not going to shake up any of the meta game and IG and Spacewolves were still going to be on the top. Now that might be the case but working out some of these list I see them shaking up the metagame a little bit. Razorbackspam will be dead by mass hellion squads and mobile infantry. IG will have a hard time with killing DE with stealth and FNP throughout the army. There are ways where Dark Eldar can start their whole army with FNP and have 80 guys on turn one 6 inches from IG which will be really tough for any army out there to actually handle.
That being said here is a list going through the book that I worked out with a couple of buddies.
1850 Points
Baron Sathonyx
Haemonculusx 2 Venom blade, anitmas vitae
Hellions x 20 Stunclaw with upgrade
Hellions x 20 stunclaw with upgrade
Cronos parasite engine Spirit probe,sirit vortex
Cronos parasite engine Spirit probe,sirit vortex
Wracks x10 10 man squad with two luqifier guns wrack sarg upgrade
Raider for the Wracks aethersails
Wyches x9 + hetrix Blaster
Raider For Wyches
Wyches x9 + hetrix Blaster
Raider For Wyches
Wyches x9 + hetrix Blaster
Raider For Wyches
Stunclaws are a neat concept as you can take IC's with you when you hit and run. Next turn you’re still in close combat with your opponent‘s IC, which means they can't shoot at you. Hit and run again and you can Dark lance the HQ and if he isn't Eternal warrior you can instant kill him or if he is Eternal warrior just shoot the mass amount of poision weapons you have and kill him by thousand cuts. Parasites I think are going to be important for any army just to have the ability to pass out pain tokens. I want to try them out but I don't know how they will work out as you need to start killing something with them turn 1 or 2 to start passing out pain tokens otherwise they lose their effectiveness and you might as well get something else in there.