Okay, heres my question. do unsaved wounds, affect multiple models? Like, if I had an oldblood with a piranha blade, riding a Carnosaur attacking 1 wound models. Does each wound multiply into the unit, or can I not affect more models than I have hit? Old blood hits twice, wounds twice. Would 2 spearmen die, or would 4 spearmen die? Carnosaur hits once, wounds, rolls a 6. Does one spearman get butched and ate, or do 3 spearmen meet an end? I ask, because I want to kill a lot of rank and files with such a monster, but I don't want to actually cheat with a poor rule interpretation.
N8 beat me to it. Your build will still do a lot of damage to rank and file, just not as effective as against a multi wound model.