Are you serving these with a meal or just as a tasting? Are there going to be other warm-up wines? If not, I’d start with the 88 Borgogno, then the 95 Scavino and then I’d serve the other four together to display the differences between the '97 and '98 vintages and modern/traditional style.
this will be at a dinner, but the menu isn’t set and we’ll be ordering off the regular menu. There will be a welcome white or two, but the main event will be the Barolos
Keith, another thing to consider is whether the Borgogno is an original release or a library release (if you know). If it is a library release, it will show much younger than it’s age. And if you have the ability to take care of the wines prior to the tasting, the '98 Cascina Francia is still a very young wine in need of aeration - either extended slow-O, or at minimum a two hour decant prior to drinking.
If the Borgogno ends up being a library release, I would actually recommend starting with the two Marcarini’s (wines that I find tend to display Barolo’s more elegant side), and pair the Borgogno with the '98 CF.