If you're going to use a Rez priority macro and don't want to step on toes it's best to take the order you have in mind and reverse it. Healers are typically going to revive a cohealer first, tank second, and DPS last although there are always exceptions based on the situation. Wait for a healer to Rez first since that should be their gut reaction and if you are able to see that both healers have used swiftcast it's normally safe to start bringing people back up yourself. Just realize that you want to avoid letting one person get double and triple revives. It's a tremendous waste of mp across the board. No one should be mad about you trying to save the party though so just try to read the situation as best you can.