(Apoligies in advance for spelling butchery.)
I'm trying to figure out the best way to use Cataphracti Terminators.
There's a few ideas that have come to mind. LC Termies have historically been outshone by TH/SS when in an Assault Terminator squad, but with a 4+ Invuln for the same cost as regular LC Termies and Assault Grenades for 10 points, they could find themselves functioning as a more viable alternative.
Similarly, while lacking Concussive, regular Cataphracti Termies also have greater durability than regular Termies, and at 35ppm could function as a totally viable alternative for Melee.
S&P means no overwatch, which is unfortunate, but manageable.
As for a Terminator Captain, there's great news and bad news.
For some inexplicable reason, he can't be made into a Chapter Master, which sucks. I'd love to use him as a real Beatstick, but his options make him into a mid-level fighter at best.
On the other hand, S&P affects his entire unit. While this has potential downsides, it can also be used to grant Relentless to heavy weapons. Want to put Grav or Melta Devestators in a Drop Pod? Go right ahead! They can deliver their payload up close and personal.
Plus, he rerolls invulns of 1, which is *Awesome*. Throw a Storm Shield on him, you've got an intensely durable character for around 100 points.