Right now I blatantly Steal what Frontline is doing. No escalation, no stronghold assault, data slates will be okay (I'm thinking no more than two codexes in one army be it via allies or slates) at 1250 I don't see it being a problem and keep in mind that this is to get out and play and on the participation piece I have reserved the right to revoke tickets this could be linked to making abusive lists.
My recommended check is would I be willing to trade my opponent armies and play against this myself, if the answer is no figure out why and fix it! We are all slightly different I want people to just come out join the community and play. :)
Also FW is totally okay.