One nation i can see doing well here is ctis(probably LA) due to their powerful sauromancers. They have strong access to death aswell as good astral/nature(national summons ftw
) and fire in LA. With a pretender to cover the paths they dont have and maybe forge boosters i can see them being a very powerful force(i wonder what happens if all squares on the battlefield are full and you try to cast raise skeletons...
)