Ogres get hacked down by beastmen core, and lore of metal.That makes them not broken right there. Armies don't have tiers IMHO they have things that work wonky (chosen-star) or things good against the meta. For instance, if you shut down DE mindrazor, they can become easy push overs. I've found, getting a monster in a flank means the end of most units as nobody takes fighy lords anymore. Each of my Lords and heroes can time a unit, as well as my specials and rares. The average army has a death star and a steadfast horde, a bsb and a wizard lord. After you take a combat character Potion of STR or speed and Obsidian blade a few times mourn fangs end up being free points.