the only one that has seats for viewing is the terrace view for the fireworks, the tony's thing does not give you chairs to watch the parade, just a place to come and go and get food through out the party.
I have done these parties
MNSSHP and MVMCP for about 12 years now and never had a need for the extra parties, just a personal opinion, not hating on people that swear by them.
I would grab a spot on MS for the fireworks right around 9:45pm, watch the fireworks and then stay put until the parade, if you must watch from MS. If not you can always watch the fireworks from MS (if you wish) and move over to Frontierland for the 11pm parade
We watched the fireworks from Crystal Palace and walked over to get cookies and Frontierland was pretty empty for the 11pm parade around 10:30