It was a patch ago, but still only gen I've managed to get to champion status was with veneti extraordinarii. That fight was on higher ground oppidum defence. The losses vs kills was kinda huge, for some reason it was close victory too so no heroics ( the cav took kinda heavy losses, but I had to get rid of their missile troops ). But yea I guess he got more heroic ones later on, but I do remember him getting rank from that fight too.
Retired;
He even used oldscool bronze blade that was kinda cool..