Totally agree Sponholz, but the solution for that is what you suggested. An extra SoT cost (i like the value of 4) for each additional trooper you bring. And this fits with the Sparton's thoughts. It wouldn't allow a faster progression, once you unlock extra troopers according to your progression and wouldn't allow easier grinding in difficult levels for begginers for the same reason. You just unlock extra troopers accordding to progression. The idea that somebody mentioneted to not include extra troopers in LoL and BnW dungeons sounds good too.