1) I thought we would just PM you with our decision and number rolled... no need to be simultaneous, as long as we don't communicate and make decisions together, when it would be "illegal" - I think we are all here to have fun and enjoy the game, not to cheat;
2) I believe the best way is to meet on Skype or something... I mean, from your perspective: "OK, hector, now you're going to fight him, let's talk on Skype at 18.00 PM, we will resolve this Phrases quickly", and hector says "fine"
Though I never played TROS "by post", so maybe my ideas make no sense?
PS. About rolling: I thought we would just link our rolls here, using a dice roller on the web... just like this:
http://kostnica.eu/roll/56e1928e04bf6/
Sorry, it's polish, but I believe you get the idea.