Eventually the rogues would kill the back units until one worked its way up and would hit the front unit.
We have a couple of these that we're thinking of implementing in the future. Our next update will have new units!
Ranked is stretch goal for sure, as well as a longer mode that we can try to implement with out current setup! Currently the game stops if you go past 30 turns just because of saving/loading data for armies. I'm looking in a way to make this longer so we can have longer games.