The fast attack slot of the daemons codex feels like it is jam packed with quite reasonable and darn good choices. Seekers of Slaanesh are probably in the quite reasonable category.
Think of them as enhanced daemonettes. In addition, they have outflank and acute senses. This makes them very agile. And did I mention swift? As cavalry, they can certainly cover a great amount of distance and combined with the mark of Slaanesh mean they can move with an additional 6" when running. That's phenomenal - and in some ways: game breaking. There's almost no other unit that can move that far.
For the upgrades, the rapturous standard is interesting and could be used for high priority target hunting. The etherblade and the heartseeker upgrades seem worthwhile on face value and probably should be taken on most squads. The lash of despair could be useful for its 2d6 assault value, but the strength is poor - as is the AP. So perhaps best to stick with an ether blade in my opinion.
Here's a pair of builds to consider:
12 Seekers of Slaanesh, including 1 Heartseeker with Etherblade. (159 points)
A large squad of rapidly moving seekers that should take a herald on a steed with them in many cases to go forth and target whichever squad they like with their rapid movement. They are a herald delivery system to some extent.
6 Seekers of Slaanesh, including Icon upgraded to rapturous standard, 1 Heartseeker with Etherblade. (117 points)
The HQ hunters.
Think of them as enhanced daemonettes. In addition, they have outflank and acute senses. This makes them very agile. And did I mention swift? As cavalry, they can certainly cover a great amount of distance and combined with the mark of Slaanesh mean they can move with an additional 6" when running. That's phenomenal - and in some ways: game breaking. There's almost no other unit that can move that far.
For the upgrades, the rapturous standard is interesting and could be used for high priority target hunting. The etherblade and the heartseeker upgrades seem worthwhile on face value and probably should be taken on most squads. The lash of despair could be useful for its 2d6 assault value, but the strength is poor - as is the AP. So perhaps best to stick with an ether blade in my opinion.
Here's a pair of builds to consider:
12 Seekers of Slaanesh, including 1 Heartseeker with Etherblade. (159 points)
A large squad of rapidly moving seekers that should take a herald on a steed with them in many cases to go forth and target whichever squad they like with their rapid movement. They are a herald delivery system to some extent.
6 Seekers of Slaanesh, including Icon upgraded to rapturous standard, 1 Heartseeker with Etherblade. (117 points)
The HQ hunters.