Atma of the {Mog house} and {Job change}.
For physical RR/GH then either VV or sanguine scythe are your best bets if you can manage without refresh atma, GH helps push the avatars critrate higher, I find RR alone too inconsistent for critrate.
Magic damage atmas depends on which avatar/group 2 merit BP you're using, heavenly strike generally puts out the highest numbers in abyssea compared to the others with beyond/MM/ultimate, for wind blade swap beyond for atma of gales, or noxious fang for grand fall and so on. You could also swap MM for hells guardian for more damage, assuming you have it and can manage without refresh atma.
If you're soloing you might want to add in a regen atma and/or ducal guard, depends on the NM really.
And yes atma effects transfer to pets, I think the only one that doesn't is apoc's auto-reraise.