So, the plan I've developed is to send a couple of scout cavalry to Baden befre the war starts, see what kind of troops he has along the Rhine. Hopefully, when the war begins, he'll think I'm going to attack there, and hold some of his nfantry back to defend the line. My main attack, though, will be in the south of France, through Sardinia-Piedmont. I may send a few reserves into the Rhine territories after he figures out the cavalry were a ruse, but only if I have some to spare.
I can take out SP before he mobilizes for sure. Then, I can try to take one of his forts along the SP-Franch border. Probably Nice, as it's where his navy is docked. Then, as I'll have a land connection through SP, I'll just deploy into Nice, and let the fun begin.
Meanwhile, my steamers will land at the coastal province that's one away from Paris and move inland. If they take the city, great. If they don't, it'll be a distraction. I can get maybe twenty divisions of cavalry there before he sends reenforcements. I'll leave the transports up there--guarded by a few ironclads--in case the cavalry need to get out. At worst, they'll force him to leave a garrison in Paris. At best, it'll create a new front which, after Paris falls, I'll be able to link up with.
Once (if

) I get 100% warscore, I'll ask for "humiliate" and "war indemnities". They're 50% each, right? If not, I'll throw in Alsace-Lorraine instead of the humiliate. I'll try to keep it below 100%, that way he's forced to accept.
Sound good?