Spoilers
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A forest of monsters like Bronze Sentries? That fight (or series of fights, more accurately) is not bad with the right buffs, but a nightmare without proper preparation.
Or are you referring to fights other than the entrance area? The enemies added by HoW (and the extras in HoF) really add to the fights. Nothing like whaling on wimpy thieves and then running smack into Kraken Mages.