Welcome to Librarium Online!
I've been collecting and playing Imperial Navy for a while now with good results and I was wondering if anyone has played an Orc fleet composed entirely (or primarily) or Brute Ramships. I was looking at the stats and they've got a good front armour to keep them in one piece and their special ramming rule makes it seem like they could do a whole pile of damage, while they cost little enough that a fleet would consist of enough models to suffer some casualties without falling apart. They also seem to have enough firepower to deal with escorts so as not to waste time trying to ram them.
i don't play bfg but i like the idea of lots of ram ships and i think it would probably work well.