obviously Marcos, killing/discarding 1 RW would mean with 3xTRT: 3x(8/3)=6 (round down). that's math for babies

@Leon: to get 9 out you'll need some horses probably (unless you boost DI), a cave drake can easily kill a horse, so discarding a horse shouldn't be a great problem. Just realise that if you'd want the mission destroyed with one RW leaving company (which I don't think is fair thematically either), people will only move to Barad-dur and back. I think losing 3 mp's by killing a RW is ok too.
@Joe, if peeps move back and forth between dangerous places, I don't really mind. Ok, is Dead Marshes dangerous? no, indeed, nor is Mount Doom or Nurniag Camp, so what does it matter? In fact, I'd skip shadowholds also then, or we should state: no site in Mordor. What honour is there for the RW's to move around mordor?
But, in sum, I like version 1 (i.e. Joe's revision of my second version).
the speed matter: actually every RW has at least 3 DI, including himself that means he needs a max of 5 horses, 4 if we exclude Uvatha as your RW, but with each point of DI extra he needs 1 less and Witch-king, Dwar and Khamul only need 2 horses. Since you can start the game with this card, I can already move, in the positive scenario I get 9 rw's, by turn 3. Why then is the speed up necessary by adding the ring clause? It's not that I object, but I don't see the need either.