Rom is a big one. Not in terms of difficulty or size, but importance. He’s one of those bosses that propels the story irrevocably forward, so I made sure I had all my affairs in order before facing him. The fight was pretty anti-climactic. It didn’t take too long to sort out that he and his minions have rock hard heads, but soft bulbous bits. All it takes is some patience and making sure to dodge his AOE attacks. I defeated him on my second try.