To court packing supporters on atlas.

[ShadowRocket]

2 because it makes up for the two stolen seats and at least keeps the ideology balance in tact  with Roberts as the swing

This is pretty much where I am.  Ideally I'd go with four as symbolic of the number of circuit court of appeals, but am amenable to two for the reasons mentioned above.  Not to mention I don't think the optics of adding more seats would look as egregious.