Regardless of your opinion of the new Daemon Psychic Powers, one thing is true, they are now almost twice as random as before. The one benefit of having only 3 powers and a primaries was that it was much more likely to get a power that you wanted with a relatively small investment in mastery levels. Let’s explore the revised Slaanesh discipline.
Discipline of Excess
Lash of Slaanesh appears to be unchanged. It is a 24″ S6 rending beam. Beams are great for getting around jink or invisibility (as you don’t target a unit, but rather a point on the table). That said, S6 rending will generally fail to ignore most armor saves and will need lucky rolls to glance/penetrate vehicles. Lash feels like a poor compromise between great powers like Psychic Shriek and Bolt of Change. Luckily Slaanesh psykers can roll on Telepathy.