So there's a new formation for Imperial Knights called the Adamantine Lance in the Red Waagh! book. It requires 3 knights (in any combination) to be played together and be within 3 inches of one another but when thus they can re-roll failed ion shield rolls. And, if they begin the assault phase thus, they can inflict d3 HoW hits rather than the normal 1.
It seems this was pretty popular at the NOVA open, and is quite powerful. Especially since, only requiring 3 knights, it can be done and still leave room for allies. So what do you all think?