OK, well, for my reference and yours, here is the most recent (that I found) listing of Administration positions, which I apparently never read in full because I didn't realize that I had two positions!

I don't need to be more than the Vice President, honestly. Sonereal is more than competent to be the Military adviser, if he wishes to officially have that position. Of course, I'm sure that every member of the Imperial Party would be more than happy to offer suggestions for war-related matters.
Unity Administration (Pending Confirmation and future requests)
Prez: MathNerd
VP: Whosit
Ministers:
Finance & Espionage: Cull
Military & War: Whosit
Technology & Development: Nuke
Foreign Affairs & Peace: WIM + Ravus
Governers / Premiers:
British Isles: Ilduce
Iberia (Western Europe): Nuke
France (Eastern Europe): Ravus
Someone (can't remember who) attempted to create an order of succession, but since governmental positions seem to change from administration to administration, it seems a futile business. Having set, official positions in the future might help, or perhaps abandoning official positions beyond the President and Vice President. Or not. Well, the larger the administration, the harder it is to find a real job for everyone, I suppose. Anyway, enough musing on that.
Personally, in terms of national importance, I would put the Minister of Foreign Affairs as third in line for succession, which means that either west india man or Ravus (or both, I suppose) would become VP if MathNerd has to put me in charge. I'd probably put Financial Minister next, followed by the Minister of War.
MN has final say, of course, but this is what I would do.