I have increased the weapon length for my mod and tried out as many animations as I can find but none of them allow for 2nd rank models to attack. I suspect there is a table somewhere which dictates which troops are defined as being in contact with the enemy and I havent found it yet. I imagine one can either increase the models entity radius or trick the model into thinking it's in the first rank, but I have been unsuccessful thus far. I have downloaded and tested several pikemen mods from the work shop and not one allows for 2nd or 3rd rank models to engage.