[Vaz]

In RAW terms? No. The book is designed for 30k and Age of Darkness battles. And has (theoretically at least) been playtested by the studio team against such armies. This includes access to age of darkness force organization and armies - legiones astartes crusade army list, solar auxilia, ordo reductor and the two other admech lists, and other questoris lists and includes access to things like Lords of War without Escalation/Apoc, 4 elites, 3 HQ, no Malefic powers, changes to the allies rules etc

FW have said it is 'allowed' but is not playtested or balanced against 40k.

That said i have had few refuse to play 30k v 40k, mixing and matching the rules dependant on ehat is needed, and being above suspicion by taking the books and relevant pdfs and answering questions by proving their source. Relying on tricky rules and being the poor writing of the rules in general in book iv, make sure have quoted the relevant sections or at least noges referring to how they interact.

In FW parlance, unless it is 40k approved and states it may be used as 'x' choice in an imperial knights army, or whatever, then it may not be used in 40k. As you are essentially houseruling, ask your opponent before the game, and have a spare 40k ready list as well should they say no to 30k (the 40k sjw's can whinge away, but it happens), and clearly state what is what for 30k models with 40k rules.

 

[Vaz]

It isn't about the balance, and the Styrix sn't exactly OP. I'm all for playing as many games as possible, and would not personally have a problem with playing vs it, a) as long as I was aware that I'd be playing a Knight list, and b) that I would be playing with new rules.

Just bringing a knight list to pick up and play games I'm not a fan of as it means if you win, it is possibly down to gimmicks or the sheer psychology of it. Having someone aware of it before givs preparation time for army list etc.

Just be aware that people are more likely to say no than normal sinply because it is more new and harder to find rules for, especially in the current status of HH4 only being LE for the tine being.