They also kicked him out due to American pressure. I think a better question is could Sudan join the forces on the other side. I don’t think so, at least not anything more than political support.
I think a NATO strike is the best option, all in it together type of thing.
PLUS by using nato you can get a much larger number of ‘highly trained’ troops i.e. all the marines in NATO, special forces etc.
You can also get NATO to do the spy work with the CIA and you can get the economic sanctions etc. on any other targets.
I do NOT think this is the time for the USA to stand alone.