Group 1 and 6 together ?

self wrote:

currently it would be 1+6, but then once group 7 hits as the next major grouping, those decks would no longer be legal.

I hadn't thought of this and it is a good enough reason not to do it.

self wrote:

On top of that, you'd have the oddity of having two vampires in the same pool that have Justicar titles

Missed this one as well.
Not as important a reason as the other one but valid still...