I'm playing NSF with a Knight-Errant at the moment and you'd be very hard-pressed to get another detachment or formation in there.
I think Purifiers, in a Pod or with a Gate of Infinity guy, are a hugely relevant addition to the Nemesis Strike Force because a pure, Dreadknights-and-GKT-to-the-max list just doesn't have the ranged punch to deal with a lot of things - four Storm Bolters and a Str7 Assault Cannon for 185pts does not impress. Purifiers allow you to clean put infantry, letting the Psycannons/Heavy Psycannons do their job and shoot up AV10-12 or gang up on AV13 in a pinch (fucking Necrons). On the other hand, Purifiers are pretty damn expensive for their resiliency (they're Marines for nearly double the price, amd what kind of target does everyone bring guns to deal with?) and NSF, especially with a big chunk of points spent on a Knight, have *massive* problems with model count, either not being able to reach objectives, being easy to tarpit, or simply being shot off the board in short order.
I think Purifiers, in a Pod or with a Gate of Infinity guy, are a hugely relevant addition to the Nemesis Strike Force because a pure, Dreadknights-and-GKT-to-the-max list just doesn't have the ranged punch to deal with a lot of things - four Storm Bolters and a Str7 Assault Cannon for 185pts does not impress. Purifiers allow you to clean put infantry, letting the Psycannons/Heavy Psycannons do their job and shoot up AV10-12 or gang up on AV13 in a pinch (fucking Necrons). On the other hand, Purifiers are pretty damn expensive for their resiliency (they're Marines for nearly double the price, amd what kind of target does everyone bring guns to deal with?) and NSF, especially with a big chunk of points spent on a Knight, have *massive* problems with model count, either not being able to reach objectives, being easy to tarpit, or simply being shot off the board in short order.
