So, you used the Nav Charts to arrange the cards in the appropriate deck, yes? Rim Space Nav Charts only affect the Rim Space Nav Deck, Alliance Space Nav Charts only affect the Alliance Space Nav Deck, etc?
We were able to move all 3 Reavers to block the other player.
How so? With the expansions a player may still mosey into a planet that has been "Reavered". You can block them from doing a full burn to a destination with Reavers, but once they are one section outside the destination, they can just mosey (or Evade) right in.
Curious what the set up was? Where was Player A moving to and from that the other 4 players stacked the decks (literally!) to prevent them from winning. Must have been a heck of a trip, I hope they were geared and crewed to the gills to prep for it!